WO2003100171A1 - Machine for spreading paving materials - Google Patents

Machine for spreading paving materials Download PDF

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Publication number
WO2003100171A1
WO2003100171A1 PCT/ES2003/000143 ES0300143W WO03100171A1 WO 2003100171 A1 WO2003100171 A1 WO 2003100171A1 ES 0300143 W ES0300143 W ES 0300143W WO 03100171 A1 WO03100171 A1 WO 03100171A1
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WO
WIPO (PCT)
Prior art keywords
materials
head
machine
arm
telescopic arm
Prior art date
Application number
PCT/ES2003/000143
Other languages
Spanish (es)
French (fr)
Inventor
Conrado Pont Feixes
Original Assignee
Conrado Pont Feixes
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8501329&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2003100171(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Conrado Pont Feixes filed Critical Conrado Pont Feixes
Priority to AU2003219183A priority Critical patent/AU2003219183A1/en
Publication of WO2003100171A1 publication Critical patent/WO2003100171A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/46—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing and placing the materials, e.g. slurry seals
    • E01C19/47—Hydraulic cement concrete mixers combined with distributing means specially adapted for road building
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/18—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
    • E01C19/182—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect solely for depositing
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00—Implements for finishing work on buildings
    • E04F21/20—Implements for finishing work on buildings for laying flooring
    • E04F21/24—Implements for finishing work on buildings for laying flooring of masses made in situ, e.g. smoothing tools
    • E04F21/245—Rotary power trowels, i.e. helicopter trowels
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00—Implements for finishing work on buildings
    • E04F21/20—Implements for finishing work on buildings for laying flooring
    • E04F21/24—Implements for finishing work on buildings for laying flooring of masses made in situ, e.g. smoothing tools
    • E04F21/245—Rotary power trowels, i.e. helicopter trowels
    • E04F21/247—Rotary power trowels, i.e. helicopter trowels used by an operator sitting on the trowel, i.e. ride-on power trowels

Definitions

  • a machine that allows the spreading of the aforementioned surface materials of the pavements to be carried out in a practical manner, providing very advantageous functional characteristics in that regard.
  • This machine object of the invention comprises a bearing assembly arranged on wheels with driving drive and steering direction, said bearing assembly being a functional assembly arranged in a rotating assembly for orientation, in whose functional assembly a telescopic arm is incorporated that carries the end one head distributor of the materials to be scattered, while in the same functional set a mixing tank-container of materials and a conveyor spindle are incorporated to carry the prepared materials from the mixing bowl to the spreading head.
  • the functional set of the machine is operated by a hydraulic system that allows the orientation of said functional set and the extension of the telescopic arm to cover the area where the application materials are to be extended, depositing said materials by means of the distributor head during telescopic arm pick-up.
  • the distributor head comprises a hopper containing the materials to be extended, which is provided with dosing rollers that determine the output of the materials uniformly and in exact quantity, said rollers being rotatably operated in combination with the collection of the telescopic arm, the actuator actuation of the aforementioned cylinders being carried out with the hydraulic return fluid of the telescopic arm actuator itself, the coupling and the uncoupling of said relation being selectable.
  • An electromagnetic level control device is incorporated in the telescopic arm, by means of which an automatic steering of a tilt drive is established to level the telescopic arm with respect to the bearing assembly, so that, once a relative leveling position of the telescopic arm, said leveling is automatically maintained throughout the entire operating process of the machine application work.
  • the distributor head is intended to be incorporated by means of a quick-hold and release coupling with respect to the telescopic arm, by means of a pin solution through a support plate with retaining wedges on the other side, or by means of a hanging hook solution by means of plates of opposite shapes; two types of heads are provided which can be optionally incorporated depending on the application, including only a hopper for the supply of the materials to be extended, or together a hopper and a laser ruler that, controlled by laser, acts in front of the hopper.
  • the telescopic boom means carrying the head to a loading position of the hopper by the conveyor screw, the material from the mixer Cuba, which makes it possible to perform all the work from the checkpoint of the machine, by a single operator, to extend in the application places the materials transported in the mixing bowl that is of great capacity.
  • Figure 1 shows a general perspective of the recommended machine, with the telescopic arm extended.
  • Figure 2 is a side view of the machine with the telescopic arm picked up.
  • Figure 3 is a perspective of the machine in the same position of the previous figure.
  • Figure 4 is an enlarged representation of the functional body of the machine according to the perspective of Figure 1.
  • Figure 5 is a front view of a head according to a different embodiment of the previous figures and in rotary arrangement with respect to the attachment with the telescopic arm of the machine.
  • Figure 6 is a corresponding plan view with respect to the previous figure.
  • Figures 7 and 8 are respective perspectives of respective fastening hooks per hanging of the machine head, the first according to an embodiment of articulated arrangement of the fastener and the second according to an embodiment of sliding arrangement of the section.
  • Figure 9 is a perspective, according to an exemplary embodiment, of the control device for maintaining the leveling of the telescopic arm in the machine.
  • Figure 10 is a longitudinal sectional view of the device of the previous figure. Description of the preferred embodiment.
  • the invention relates to a machine intended to provide the materials with which the appearance or surface finish of concrete-based pavements is determined, allowing solid and liquid materials to be mixed, such as quartz, corindo, cement, dyes, etc. , for spreading on fresh-based concrete, in constant and uniform quantity.
  • the machine comprises a bearing assembly (1) that is arranged on wheels (2), with drive means (3) of drive and steering, preferably of hydraulic type.
  • a functional assembly consisting of a platform (4), arranged in a swivel mount (5) that allows orientation as necessary, is incorporated on said bearing assembly (1).
  • the functional set includes on the platform (4) a command post (6), from where all the operational operation of the machine is governed, incorporating on the said platform (4) a mixing tank-tank (7) destined to house and Prepare the application materials, with a telescopic arm (8) also arranged, at the end of which a head (9) is incorporated to distribute the materials on the application surfaces.
  • the mixing bowl (7) is a large capacity cylindrical tank, rotatably arranged in an almost horizontal position, driven by an engine (10) and with an extreme mouth (11), in relation to which a load feeder (12) ) and a discharge picker (13).
  • the head (9) comprises a hopper (14) intended to accommodate the materials to be extended, -. said hopper (14) in the lower part of an outlet of the materials, in relation to which rollers (15 and 16) are arranged by means of which a dosage of the materials that are dropped to the surface of application.
  • the rollers (15 and 16) are operated rotating, being provided with two actuators (17 and 18), which may be related by driving together by means of the same driving element, so that the speed of rotation of said rollers (15 and 16) is what determines the amount of materials that are dropped from the hopper (14).
  • the telescopic arm (8) is susceptible to longitudinal extension and recollection by means of one or more hydraulic actuating cylinders, the actuators (17 and 18) being driven from the cylinders (15 and 16) of the hopper (14) related to the actuation of the telescoping of the arm (8), in particular determining the motor drive of said actuators (17 and 18) by means of the hydraulic return fluid of the actuator cylinders or of the telescoping of the arm (8), whereby a Dispensing of the material from the hopper (14), which is a function of the speed with which the telescopic arm (8) moves the head (9), which allows the material to spread evenly over the application surfaces.
  • a conveyor spindle (19) whose end protrudes from the platform (4) extends in the same direction as the telescopic arm (8) from under the discharge collector (8), so that in the collected position of the telescopic arm (8) ) the head (9) is left with the hopper (14) just below said end of that conveyor spindle (19), as shown in Figures 2 and 3.
  • the application materials are introduced into the tank-tank (7), which by the rotation of said tank (7) are mixed forming the compound to deposit, which can be transported inside the tank (7) to the place of application, although the load can also be carried out in the workplace.
  • the material is dropped from the tank (7) to the conveyor spindle (19), through which it is carried to the hopper (14) of the head (9), stopping the supply when filling said hopper (14) It is completed to the desired level.
  • the arm (8) is extended above said surface, and then, from the extended position, the arm (8) is collected again by operating the rollers (15 and 16) of the hopper (14), whereby the material is falling from said hopper
  • the uniformity of the spreading of the material also contributes to the use of hydraulic return fluid from the telescoping drive for actuation (17 and 18). of the arm (8), since this achieves a drive of the rollers (15 and 16) that does not suffer alteration due to changes in temperature of the hydraulic fluid used.
  • the head (9) can be formed only by the hopper (14) and held in a fixed position administratwith respect to the telescopic arm (8), as in figures 1, 2 and 3, but an embodiment is also provided (figures 5 and 6) in which said head (9) also incorporates a ruler (20) arranged parallel to the hopper (14) in a somewhat lower position than the lower mouth thereof, so that in the working operation the ruler (20 ), laser controlled, scratches the surface of the fresh concrete on which hopper (14) then drops the application material, thus achieving a more perfect finish.
  • the head restraint with respect to the telescopic arm (8) is established with a joint (21) and the possibility of orientation actuation by means of an actuator (22), allowing work with the head (9) in variable positions with respect to the telescopic arm (8), from a position perpendicular to it to positions of a steep inclination to either side.
  • the fastening of the head restraint (9) with respect to the telescopic arm (8) can be established, according to a known solution, as in the form represented, by fixing a support plate (23) integral with the head, with integral shafts of the telescopic arm (8) that pass through the mentioned plate (23) and retention on the other side by means of locking wedges, which allows to incorporate and remove the head (9) with relative ease, with respect to the assembly in the machine, always That is necessary.
  • a hanging mounting solution is provided, which further facilitates the incorporation and removal of the head (9) without losing the effectiveness of the support, by using supports such as those in Figures 7 and 8, formed by two plates ( 24 and 25) formed in a opposite way, one with the upper edge and the other with the lower edge in the form of a hook (26), so that, one of them being fixed in solidarity with the telescopic arm (8) and the other in solidarity with the head (9), for the assembly and disassembly of the latter it is only necessary to fit and disengage the mentioned plates (24 and 25) of the supports from each other.
  • two types of supports are also provided, one of them with an articulation coupling (27) as in figure 7, and another with sliding couplings (28), as in the figure 8, so that by combining the head mounting bracket (9) with both types of brackets, a rotating arrangement is achieved that allows the head (9) to be oriented as desired.
  • an automatic leveling control device is provided, which is incorporated on the telescopic arm (8) and in relation to the actuator means (29) of the tilting of said telescopic arm (8) for leveling.
  • the leveling control device consists of a hollow cylinder (30), inside which a freely movable metal ball (31) goes, while at one end of said Cylinder (30) incorporates an electromagnetic detector (32) which, by means of connecting cables (33), is related to the actuation of the tilting means (29) of the telescopic arm (8).
  • the cylinder (30) is integrally connected to a support plate (34), which through a hole (35) it is held in a tilting manner, and can be fixed through a torn hole (36) in variable positions that affect the position of the cylinder (30) with respect to the horizontal.
  • the detector (32) is incorporated with respect to the cylinder
  • two detectors (32) can be arranged at both ends, whereby the device is similarly sensitive in the inclination towards both sides, thus allowing a more leveling regulation. effective.

Abstract

The invention relates to a machine for spreading paving materials, comprising a support assembly (1) having a platform (4) pivot mounted thereon. The aforementioned platform (4) comprises: a rotating drum (7) which mixes and transports the materials to be used, and a telescopic arm (8) having a head (9) at the end thereof, which is used to unload the materials onto the surface to be covered. According to the invention, the materials are transferred from the drum (7) to the head (9) using a conveyor screw (19) which is disposed on said platform (4).

Description

DESCRIPCIÓNDESCRIPTION
MÁQUINA PARA ESPARCIR MATERIALES DE PAVIMENTACIÓN.MACHINE TO SPREAD PAVING MATERIALS.
Antecedentes de la invención.Background of the invention.
En la construcción de pavimentos es conocida la disposición de una capa de hormigón, sobre la cual se extienden materiales de superficie con los que se determina el acabado superf cial .In the construction of pavements the arrangement of a concrete layer is known, on which surface materials are extended with which the surface finish is determined.
La aportación de los materiales de la superficie resulta complicada, debido a que dichos materiales se deben de repartir de un modo uniforme sobre la superficie del hormigón fresco, respetando el enrasado de éste, lo cual supone un problema de operación para depositar los materiales y un problema de dosificación para que la cantidad del material superficial sea uniforme en toda la extensión tratada.The contribution of the surface materials is complicated, because these materials must be distributed evenly over the surface of the fresh concrete, respecting the flush of the concrete, which is an operation problem to deposit the materials and a Dosing problem so that the amount of the surface material is uniform throughout the treated area.
Con los medios que actualmente existen dichos problemas no se resuelven en un grado satisfactorio, repercutiendo en un trabajo que resulta muy costoso de realizar y en unos resultados que no proporcionan la perfección que es deseable en las superficies de aplicación . Objeto de la invención.With the means that currently exist such problems are not resolved to a satisfactory degree, impacting on a job that is very expensive to perform and on results that do not provide the perfection that is desirable on the application surfaces. Object of the invention.
De acuerdo con la presente invención se propone una máquina que permite realizar de un modo práctico el esparcimiento de los mencionados materiales superficiales de los pavimentos , aportando unas caracteristicas funcionales muy ventajosas a ese respecto .In accordance with the present invention, a machine is proposed that allows the spreading of the aforementioned surface materials of the pavements to be carried out in a practical manner, providing very advantageous functional characteristics in that regard.
Esta máquina objeto de la invención comprende un conjunto portante dispuesto sobre ruedas con accionamiento motriz y dirección de gobierno, yendo sobre dicho conjunto portante un conjunto funcional dispuesto en montaje giratorio para su orientación, en cuyo conjunto funcional va incorporado un brazo telescópico que lleva en el extremo un cabezal distribuidor de los materiales a esparcir, mientras que en el mismo conjunto funcional va incorporada una cuba-depósito mezcladora de materiales y un husillo transportador para llevar los materiales preparados desde la cuba mezcladora hasta el cabezal esparcidor .This machine object of the invention comprises a bearing assembly arranged on wheels with driving drive and steering direction, said bearing assembly being a functional assembly arranged in a rotating assembly for orientation, in whose functional assembly a telescopic arm is incorporated that carries the end one head distributor of the materials to be scattered, while in the same functional set a mixing tank-container of materials and a conveyor spindle are incorporated to carry the prepared materials from the mixing bowl to the spreading head.
El conjunto funcional de la máquina es actuado por un sistema hidráulico que permite el giro de orientación de dicho conjunto funcional y la extensión del brazo telescópico para cubrir la zona en la que se han de extender los materiales de aplicación, depositándose dichos materiales por medio del cabezal distribuidor durante el recogimiento del brazo telescópico .The functional set of the machine is operated by a hydraulic system that allows the orientation of said functional set and the extension of the telescopic arm to cover the area where the application materials are to be extended, depositing said materials by means of the distributor head during telescopic arm pick-up.
El cabezal distribuidor comprende una tolva contenedora de los materiales a extender, la cual va provista con unos rodillos dosificadores que determinan la salida de los materiales de manera uniforme y en cantidad exacta, yendo dichos rodillos actuados giratoriamente en combinación con la recogida del brazo telescópico, realizándose el accionamiento del actuador de los mencionados cilindros con el propio fluido hidráulico de retorno del actuador del brazo telescópico, pudiendo seleccionarse el acoplamiento y el desaσoplamiento de dicha relación.The distributor head comprises a hopper containing the materials to be extended, which is provided with dosing rollers that determine the output of the materials uniformly and in exact quantity, said rollers being rotatably operated in combination with the collection of the telescopic arm, the actuator actuation of the aforementioned cylinders being carried out with the hydraulic return fluid of the telescopic arm actuator itself, the coupling and the uncoupling of said relation being selectable.
De esta manera la distribución de los materiales a extender se produce de un modo absolutamente constante y uniforme, ya que la dosificación de salida de los materiales va combinada con el movimiento del cabezal llevado por el brazo telescópico, de modo que la cantidad del material que sale de la tolva es función de la velocidad del movimiento con la que es desplazado el cabezal y si el desplazamiento se para simultáneamente queda interrumpida la salida de material .In this way the distribution of the materials to be extended occurs in an absolutely constant and uniform way, since the output dosage of the materials is combined with the movement of the head carried by the telescopic arm, so that the amount of the material that It leaves the hopper is a function of the speed of movement with which the head is displaced and if the displacement stops simultaneously the output of material is interrupted.
Por otra parte, al ser actuados los rodillos dosificadores por medio del fluido hidráulico de retorno del actuador del brazo telescópico, dicha actuación de los rodillos dosificadores no sufre alteraciones por cambio de temperatura del fluido hidráulico accionador, lográndose una dosificación totalmente uniforme en todo el proceso .On the other hand, when the dosing rollers are operated by means of the hydraulic return fluid of the telescopic arm actuator, said actuation of The dosing rollers do not suffer alterations due to a change in the temperature of the hydraulic actuator fluid, achieving a completely uniform dosage throughout the process.
En el brazo telescópico se incorpora un dispositivo electromagnético de control de nivel , mediante el cual se establece un gobierno automático de un accionamiento de basculación para nivelar el brazo telescópico respecto del conjunto portante, de modo que, una vez prefijada una posición relativa de nivelación del brazo telescópico, dicha nivelación se mantiene automáticamente en todo el proceso operativo del trabajo de aplicación de la máquina.An electromagnetic level control device is incorporated in the telescopic arm, by means of which an automatic steering of a tilt drive is established to level the telescopic arm with respect to the bearing assembly, so that, once a relative leveling position of the telescopic arm, said leveling is automatically maintained throughout the entire operating process of the machine application work.
El cabezal distribuidor se prevé incorporado mediante un acoplamiento de rápida sujeción y liberación respecto del brazo telescópico, mediante una solución de pasadores a través de una placa soporte con cuñas de retención por el otro lado, o mediante una solución de enganches de colgado por medio de unas placas de formas contrapuestas ; estando previstos dos tipos de cabezales que se pueden incorporar opcionalmente en función de la aplicación, incluyendo sólo una tolva de suministro de los materiales a extender, o conjuntamente una tolva y una regla raseadora que, controlada por láser, actúa por delante de la tolva.The distributor head is intended to be incorporated by means of a quick-hold and release coupling with respect to the telescopic arm, by means of a pin solution through a support plate with retaining wedges on the other side, or by means of a hanging hook solution by means of plates of opposite shapes; two types of heads are provided which can be optionally incorporated depending on the application, including only a hopper for the supply of the materials to be extended, or together a hopper and a laser ruler that, controlled by laser, acts in front of the hopper.
El brazo telescópico permite llevar al cabezal hasta una posición de carga de la tolva mediante el husillo transportador de, los materiales desde la cuba mezcladora, lo cual hace posible la realización de todo el trabajo desde el puesto de control de la máquina, por un único operario, para extender en los lugares de aplicación los materiales transportados en la cuba mezcladora que es de gran capacidad.The telescopic boom means carrying the head to a loading position of the hopper by the conveyor screw, the material from the mixer Cuba, which makes it possible to perform all the work from the checkpoint of the machine, by a single operator, to extend in the application places the materials transported in the mixing bowl that is of great capacity.
Por todo ello, dicha máquina objeto de la invención resulta ciertamente de unas caracteristicas muy ventajosas, adquiriendo vida propia y carácter preferente para la función a la que se halla destinada . Breve descripción de los dibujos.Therefore, said machine object of the invention certainly results from very characteristic features. advantageous, acquiring its own life and preferential character for the function to which it is intended. Brief description of the drawings.
La figura 1 muestra una perspectiva general de la máquina preconizada, con el brazo telescópico extendido.Figure 1 shows a general perspective of the recommended machine, with the telescopic arm extended.
La figura 2 es una vista lateral de la máquina con el brazo telescópico recogido .Figure 2 is a side view of the machine with the telescopic arm picked up.
La figura 3 es una perspectiva de la máquina en la misma posición de la figura anterior.Figure 3 is a perspective of the machine in the same position of the previous figure.
La figura 4 es una representación ampliada del cuerpo funcional de la máquina según la perspectiva de la figura 1.Figure 4 is an enlarged representation of the functional body of the machine according to the perspective of Figure 1.
La figura 5 es una vista frontal de un cabezal según una realización diferente de las figuras anteriores y en disposición giratoria respecto de la sujeción con el brazo telescópico de la máquina.Figure 5 is a front view of a head according to a different embodiment of the previous figures and in rotary arrangement with respect to the attachment with the telescopic arm of the machine.
La figura 6 es una correspondiente vista en planta respecto de la figura anterior.Figure 6 is a corresponding plan view with respect to the previous figure.
Las figuras 7 y 8 son sendas perspectivas de respectivos enganches de sujeción por colgado del cabezal de la máquina, el primero según una realización de disposición articulada de la sujeción y el segundo según una realización de disposición deslizante de la s jeció .Figures 7 and 8 are respective perspectives of respective fastening hooks per hanging of the machine head, the first according to an embodiment of articulated arrangement of the fastener and the second according to an embodiment of sliding arrangement of the section.
La figura 9 es una perspectiva, según un ejemplo de realización, del dispositivo de control para mantener la nivelación del brazo telescópico en la máquina.Figure 9 is a perspective, according to an exemplary embodiment, of the control device for maintaining the leveling of the telescopic arm in the machine.
La figura 10 es una vista en sección longitudinal del dispositivo de la figura anterior. Descripción de la forma de realización preferente.Figure 10 is a longitudinal sectional view of the device of the previous figure. Description of the preferred embodiment.
La invención se refiere a una máquina destinada para aportar los materiales con los que se determina el aspecto o la terminación superficial d las pavimentaciones con base de hormigón, permitiendo mezclar materiales sólidos y líquidos , tales como cuarzo, corindo , cemento, colorantes , etc . , para su esparcimiento sobre el hormigón de base fresco, en cantidad constante y uniforme .The invention relates to a machine intended to provide the materials with which the appearance or surface finish of concrete-based pavements is determined, allowing solid and liquid materials to be mixed, such as quartz, corindo, cement, dyes, etc. , for spreading on fresh-based concrete, in constant and uniform quantity.
La máquina comprende un conjunto portante (1) que va dispuesto sobre ruedas (2) , con medios (3) de accionamiento motriz y dirección de gobierno, preferentemente de tipo hidráulico.The machine comprises a bearing assembly (1) that is arranged on wheels (2), with drive means (3) of drive and steering, preferably of hydraulic type.
Sobre dicho conjunto portante (1) va incorporado un conjunto funcional formado por una plataforma (4) , dispuesta en montaje giratorio (5) que permite la orientación según sea necesario .A functional assembly consisting of a platform (4), arranged in a swivel mount (5) that allows orientation as necessary, is incorporated on said bearing assembly (1).
El conjunto funcional incluye sobre la plataforma (4) un puesto de mando (6) , desde donde se gobierna toda la actuación operativa de la máquina, incorporando sobre la mencionada plataforma (4) una cuba-depósito mezcladora (7) destinada para alojar y preparar los materiales de aplicación, yendo dispuesto además un brazo telescópico (8) , en el extremo del cual se incorpora un cabezal (9) destinado para distribuir los materiales sobre las superficies de aplicación.The functional set includes on the platform (4) a command post (6), from where all the operational operation of the machine is governed, incorporating on the said platform (4) a mixing tank-tank (7) destined to house and Prepare the application materials, with a telescopic arm (8) also arranged, at the end of which a head (9) is incorporated to distribute the materials on the application surfaces.
La cuba mezcladora (7) es un depósito cilindrico de gran capacidad, dispuesto giratoriamente en posición casi horizontal, con accionamiento mediante un motor (10) y con una embocadura extrema (11) , en relación con la cual va un alimentador de carga (12) y un recogedor de descarga (13) .The mixing bowl (7) is a large capacity cylindrical tank, rotatably arranged in an almost horizontal position, driven by an engine (10) and with an extreme mouth (11), in relation to which a load feeder (12) ) and a discharge picker (13).
El cabezal (9) comprende una tolva (14) destinada para alojar los materiales a extender, -. determinando dicha tolva (14) en la parte inferior una boca de salida de los materiales , en relación con la cual van dispuestos unos rodillos (15 y 16) mediante los cuales se determina una dosificación de los materiales que se dejan caer a la superficie de aplicación.The head (9) comprises a hopper (14) intended to accommodate the materials to be extended, -. said hopper (14) in the lower part of an outlet of the materials, in relation to which rollers (15 and 16) are arranged by means of which a dosage of the materials that are dropped to the surface of application.
Para determinar la salida de los materiales desde la tolva (14) , los rodillos (15 y 16) se actúan giratoriamente , yendo provistos para ello con sendos actuadores (17 y 18) , los cuales pueden estar relacionados accionándose conjuntamente mediante un mismo elemento motriz , de manera que la velocidad del giro de dichos rodillos (15 y 16) es la que determina la cantidad de materiales que se deja caer desde la tolva (14) .To determine the output of the materials from the hopper (14), the rollers (15 and 16) are operated rotating, being provided with two actuators (17 and 18), which may be related by driving together by means of the same driving element, so that the speed of rotation of said rollers (15 and 16) is what determines the amount of materials that are dropped from the hopper (14).
El brazo telescópico (8) es susceptible de extensión y recogimiento longitudinal por medio de uno o más cilindros accionadores hidráulicos , estando el accionamiento de los actuadores (17 y 18) de los cilindros (15 y 16) de la tolva (14) relacionado con el accionamiento del telescopaje del brazo (8) , en particular determinándose el accionamiento motriz de los mencionados actuadores (17 y 18) mediante el fluido hidráulico de retorno del o los cilindros accionadores del telescopaje del brazo (8) , con lo cual se obtiene una dosificación de salida del material desde la tolva (14) que es función de la velocidad con la que el brazo telescópico (8) desplaza al cabezal (9) , lo cual permite realizar un esparcimiento del material de manera uniforme sobre las superficies de aplicación.The telescopic arm (8) is susceptible to longitudinal extension and recollection by means of one or more hydraulic actuating cylinders, the actuators (17 and 18) being driven from the cylinders (15 and 16) of the hopper (14) related to the actuation of the telescoping of the arm (8), in particular determining the motor drive of said actuators (17 and 18) by means of the hydraulic return fluid of the actuator cylinders or of the telescoping of the arm (8), whereby a Dispensing of the material from the hopper (14), which is a function of the speed with which the telescopic arm (8) moves the head (9), which allows the material to spread evenly over the application surfaces.
Desde debajo del recogedor de descarga (13) se extiende en el mismo sentido que el brazo telescópico (8) un husillo transportador (19) cuyo extremo sobresale de la plataforma (4) , de manera que en la posición recogida del brazo telescópico (8) el cabezal (9) queda con la tolva (14) precisamente por debajo de dicho extremo de ese husillo transportador (19) , como muestran las figuras 2 y 3.A conveyor spindle (19) whose end protrudes from the platform (4) extends in the same direction as the telescopic arm (8) from under the discharge collector (8), so that in the collected position of the telescopic arm (8) ) the head (9) is left with the hopper (14) just below said end of that conveyor spindle (19), as shown in Figures 2 and 3.
En esas condiciones, para la utilización de la máquina, a través del alimentador de carga (12) se introducen en la cuba-depósito (7) los materiales de aplicación, los cuales por el giro de dicha cuba (7) se mezclan formando el compuesto a depositar, el cual puede ser transportado dentro de la cuba (7) hasta el lugar de aplicación, aunque la carga se puede realizar también en el lugar de trabajo.Under these conditions, for the use of the machine, through the load feeder (12), the application materials are introduced into the tank-tank (7), which by the rotation of said tank (7) are mixed forming the compound to deposit, which can be transported inside the tank (7) to the place of application, although the load can also be carried out in the workplace.
Cuando la máquina se halla ubicada en el lugar de trabajo, con el brazo (8) en la posición recogida como en las figuras 2 y 3 , a través del recogedor de descargaWhen the machine is located in the workplace, with the arm (8) in the position collected as in figures 2 and 3, through the discharge picker
(13) se deja caer el material desde la cuba (7) al husillo transportador (19) , mediante el cual se lleva hasta la tolva (14) del cabezal (9) , deteniendo el suministro cuando el llenado de dicha tolva (14) se completa hasta el nivel deseado.(13) the material is dropped from the tank (7) to the conveyor spindle (19), through which it is carried to the hopper (14) of the head (9), stopping the supply when filling said hopper (14) It is completed to the desired level.
Para depositar el material sobre la superficie de aplicación, se extiende el brazo (8) por encima de dicha superficie, y después, desde la posición extendida, se recoge de nuevo el brazo (8) haciendo funcionar al mismo tiempo los rodillos (15 y 16) de la tolva (14) , con lo cual el material va cayendo desde la mencionada tolvaTo deposit the material on the application surface, the arm (8) is extended above said surface, and then, from the extended position, the arm (8) is collected again by operating the rollers (15 and 16) of the hopper (14), whereby the material is falling from said hopper
(14) quedando esparcido sobre la superficie inferior.(14) being scattered on the lower surface.
El accionamiento de los actuadores (17 y 18) de los rodillos (15 y 16) , mediante el fluido hidráulico de retorno del accionamiento del telescopaje del brazo (8) , hace que la salida del material desde la tolva (14) sea función de la velocidad del desplazamiento del cabezal (9) llevado por el brazo (8) , de manera que cuanto mayor es la velocidad de dicho desplazamiento mayor es la cantidad de material que cae desde la tolva (14) y, si el movimiento se para, deja de caer material, ya que entonces no existe fluido hidráulico que accione a los actuadores (17 y 18) , con lo que el esparcimiento del material sobre la superficie de aplicación resulta totalmente uniforme.The actuation of the actuators (17 and 18) of the rollers (15 and 16), by means of the hydraulic return fluid of the arm telescoping drive (8), makes the output of the material from the hopper (14) a function of the speed of displacement of the head (9) carried by the arm (8), so that the greater the speed of said displacement, the greater the amount of material that falls from the hopper (14) and, if the movement stops, material stops falling, since then there is no hydraulic fluid that drives the actuators (17 and 18), so that the spreading of the material on the application surface is completely uniform.
A esa uniformidad del esparcimiento del material contribuye también el hecho de utilizar para el accionamiento de los actuadores (17 y 18) el fluido hidráulico de retorno del accionamiento del telescopaje del brazo (8) , ya que con ello se logra un accionamiento de los rodillos (15 y 16) que no sufre alteración por cambios de temperatura del fluido hidráulico utilizado.The uniformity of the spreading of the material also contributes to the use of hydraulic return fluid from the telescoping drive for actuation (17 and 18). of the arm (8), since this achieves a drive of the rollers (15 and 16) that does not suffer alteration due to changes in temperature of the hydraulic fluid used.
La aportación del fluido hidráulico para el accionamiento de los actuadores (17 y 18) de los rodillos (15 y 16) , se efectúa a través de un distribuidor comandable, de forma que desde el puesto (6) de mando se puede determinar que el fluido hidráulico de retorno del telescopaje del brazo (8) pase al accionamiento de los actuadores (17 y 18) , con lo que la salida del material desde la tolva (14) resulta efectiva en función del movimiento del telescopaje del brazo (8) , pudiendo establecerse también el desvío a tanque del mencionado fluido hidráulico, cortando su llegada al accionamiento de los actuadores (17 y 18) , en cuya situación no se produce salida del material desde la tolva (14) aunque el telescopaje del brazo (8) se accione .The contribution of the hydraulic fluid for the actuation of the actuators (17 and 18) of the rollers (15 and 16), is carried out through a commandable distributor, so that from the command post (6) it can be determined that the Hydraulic return fluid of the arm telescoping (8) passes to the actuator actuation (17 and 18), whereby the output of the material from the hopper (14) is effective depending on the movement of the arm telescoping (8), the diversion to tank of the mentioned hydraulic fluid can also be established, cutting its arrival to the actuator actuation (17 and 18), in which situation there is no output of the material from the hopper (14) although the telescoping of the arm (8) is power
Cuando la tolva (14) queda vacía de producto, basta con recoger el brazo (8) , llevando al cabezal (9) a la posición de situación por debajo del extremo del husillo transportador (19) y en dicha posición proceder al llenado de la tolva (14) como al principio, es decir dejando caer desde la cuba (7) material al recogedor de descarga (13) , para mediante el husillo transportador (19) llevar ese material a descargarlo en la tolva (14) .When the hopper (14) is empty of product, simply pick up the arm (8), bringing the head (9) to the position position below the end of the conveyor spindle (19) and in that position proceed to filling the hopper (14) as at the beginning, that is, dropping material from the tank (7) to the discharge collector (13), to use the conveyor spindle (19) to carry that material to unload it in the hopper (14).
El cabezal (9) puede estar formado sólo por la tolva (14) y sujetarse en una posición fija„respecto del brazo telescópico (8), como en las figuras 1, 2 y 3, pero también se prevé una realización (figuras 5 y 6) en la que dicho cabezal (9) incorpora además una regla (20) dispuesta paralelamente a la tolva (14) en una posición algo más baja que la boca inferior de ésta, de manera que en la operación de trabajo la regla (20) , controlada por láser, rasea la superficie del hormigón fresco sobre la cual la tolva (14) deja caer después el material de aplicación, consiguiéndose así un acabado más perfecto.The head (9) can be formed only by the hopper (14) and held in a fixed position „with respect to the telescopic arm (8), as in figures 1, 2 and 3, but an embodiment is also provided (figures 5 and 6) in which said head (9) also incorporates a ruler (20) arranged parallel to the hopper (14) in a somewhat lower position than the lower mouth thereof, so that in the working operation the ruler (20 ), laser controlled, scratches the surface of the fresh concrete on which hopper (14) then drops the application material, thus achieving a more perfect finish.
También se prevé, como se observa en las figuras 5 y 6, que la sujeción del cabezal con respecto al brazo telescópico (8) se establezca con una articulación (21) y posibilidad de accionamiento de orientación mediante un actuador (22) , permitiendo trabajar con el cabezal (9) en posiciones variables respecto del brazo telescópico (8) , desde una posición perpendicular al mismo hasta posiciones de una pronunciada inclinación hacia cualquier lado .It is also envisaged, as seen in Figures 5 and 6, that the head restraint with respect to the telescopic arm (8) is established with a joint (21) and the possibility of orientation actuation by means of an actuator (22), allowing work with the head (9) in variable positions with respect to the telescopic arm (8), from a position perpendicular to it to positions of a steep inclination to either side.
El amarre de la sujeción del cabezal (9) con respecto al brazo telescópico (8) se puede establecer, según una solución conocida, como en la forma representada, mediante fijación de una placa de soporte (23) solidaria al cabezal, con vastagos solidarios del brazo telescópico (8) que pasan a través de la mencionada placa (23) y retención al otro lado mediante cuñas de bloqueo, lo cual permite incorporar y retirar el cabezal (9) con relativa facilidad, respecto del montaje en la máquina, siempre que sea necesario.The fastening of the head restraint (9) with respect to the telescopic arm (8) can be established, according to a known solution, as in the form represented, by fixing a support plate (23) integral with the head, with integral shafts of the telescopic arm (8) that pass through the mentioned plate (23) and retention on the other side by means of locking wedges, which allows to incorporate and remove the head (9) with relative ease, with respect to the assembly in the machine, always That is necessary.
Se prevé no obstante una solución de montaje por colgado, que facilita aún más la incorporación y retirada del cabezal (9) sin perder efectividad de la sujeción, mediante la utilización de soportes como los de las figuras 7 y 8, formados por sendas placas (24 y 25) conformadas de manera contrapuesta la una con el borde superior y la otra con el borde inferior en forma de gancho (26) , de manera que, estableciéndose una de ellas solidaria al brazo telescópico (8) y la otra solidaria al cabezal (9) , para el montaje y desmontaje de este último solo es necesario encajar y desencajar las mencionadas placas (24 y 25) de los soportes entre sí.However, a hanging mounting solution is provided, which further facilitates the incorporation and removal of the head (9) without losing the effectiveness of the support, by using supports such as those in Figures 7 and 8, formed by two plates ( 24 and 25) formed in a opposite way, one with the upper edge and the other with the lower edge in the form of a hook (26), so that, one of them being fixed in solidarity with the telescopic arm (8) and the other in solidarity with the head (9), for the assembly and disassembly of the latter it is only necessary to fit and disengage the mentioned plates (24 and 25) of the supports from each other.
Para permitir la disposición giratoria del cabezal (9) respecto del brazo telescópico (8) , se prevén además dos tipos de soportes, uno de ellos con un acoplamiento de articulación (27) como en la figura 7, y otro con acoplamientos (28) de deslizamiento, como en la figura 8, de manera que combinando la sujeción del montaje del cabezal (9) con ambos tipos de soportes, se consigue una disposición giratoria que permite orientar el cabezal (9) según se desee.To allow rotating head arrangement (9) with respect to the telescopic arm (8), two types of supports are also provided, one of them with an articulation coupling (27) as in figure 7, and another with sliding couplings (28), as in the figure 8, so that by combining the head mounting bracket (9) with both types of brackets, a rotating arrangement is achieved that allows the head (9) to be oriented as desired.
El trabajo del esparcimiento del material de aplicación sobre las superficies correspondientes , sobre todo si el cabezal (9) incorpora una regla (20) para rasear la superficie, requiere que el brazo telescópico (8) esté nivelado según una determinada posición con respecto a la máquina, lo cual puede hacerse ajustando manualmente la nivelación del brazo (8) cada vez que sea necesario cuando la máquina se mueve, pero esto resulta costoso y complicado .The work of spreading the application material on the corresponding surfaces, especially if the head (9) incorporates a ruler (20) to rase the surface, requires that the telescopic arm (8) be level according to a certain position with respect to the machine, which can be done by manually adjusting arm leveling (8) whenever necessary when the machine moves, but this is expensive and complicated.
Para evitar el repetitivo ajuste manual de la nivelación, de acuerdo con la invención se prevé un dispositivo de control automático de la nivelación, que se incorpora sobre el brazo telescópico (8) y en relación con los medios (29) actuadores de la basculación de dicho brazo telescópico (8) para su nivelación .In order to avoid the repetitive manual adjustment of the leveling, according to the invention, an automatic leveling control device is provided, which is incorporated on the telescopic arm (8) and in relation to the actuator means (29) of the tilting of said telescopic arm (8) for leveling.
Según una forma de realización, como muestran las figuras 9 y 10, el dispositivo de control de la nivelación consta de un cilindro hueco (30) , en cuyo interior va una bola metálica (31) libremente móvil, mientras que en un extremo de dicho cilindro (30) se incorpora un detector electromagnético (32) que por medio de cables conectores (33) se relaciona con el accionamiento de los medios (29) de basculación del brazo telescópico (8) .According to one embodiment, as shown in Figures 9 and 10, the leveling control device consists of a hollow cylinder (30), inside which a freely movable metal ball (31) goes, while at one end of said Cylinder (30) incorporates an electromagnetic detector (32) which, by means of connecting cables (33), is related to the actuation of the tilting means (29) of the telescopic arm (8).
El cilindro (30) va solidariamente unido a una placa soporte (34) , la cual a través de un orificio (35) se sujeta de forma basculante, pudiendo fijarse a través de un orificio rasgado (36) en posiciones variables que afectan a la posición del cilindro (30) respecto de la horizontal .The cylinder (30) is integrally connected to a support plate (34), which through a hole (35) it is held in a tilting manner, and can be fixed through a torn hole (36) in variable positions that affect the position of the cylinder (30) with respect to the horizontal.
En esas condiciones , mediante una regulación inicial, posicionando el dispositivo mediante sujeción de la placa (34) en la posición que corresponda con la nivelación del brazo telescópico (8) , en la cual la bolaUnder these conditions, by initial regulation, positioning the device by holding the plate (34) in the position corresponding to the leveling of the telescopic arm (8), in which the ball
(31) llegue justo a tocar con el detector (32) , se obtiene una disposición en la cual si por el movimiento de la máquina se descorrige la nivelación necesaria del brazo (8) con respecto a la posición de trabajo, la bola(31) it reaches just to touch with the detector (32), an arrangement is obtained in which if the necessary leveling of the arm (8) with respect to the working position, the ball is removed by the movement of the machine
(31) pierde el contacto con el detector (32) , en cuyo caso dicho detector genera una señal que activa el accionamiento de los medios (29) , los cuales cambian la inclinación del brazo (8) hasta que la bola (31) vuelve a tocar con el detector (32) , generando entonces éste otra señal que desactiva el accionamiento de los medios(31) loses contact with the detector (32), in which case said detector generates a signal that activates the actuation of the means (29), which change the inclination of the arm (8) until the ball (31) returns to touch with the detector (32), then generating this other signal that deactivates the actuation of the means
(29).(29).
El detector (32) se incorpora respecto del cilindroThe detector (32) is incorporated with respect to the cylinder
(30) en disposición roscada, pudiendo variarse la posición relativa de dicho detector (32) respecto de su introducción en el cilindro (30) , lo cual permite también un ajuste de regulación del dispositivo para su función .(30) in threaded arrangement, the relative position of said detector (32) being varied with respect to its introduction into the cylinder (30), which also allows a regulation adjustment of the device for its function.
Por otra parte, en relación con el cilindro (30) se pueden disponer sendos detectores (32) por los dos extremos , con lo cual el dispositivo resulta sensible de igual modo en la inclinación hacia ambos lados , permitiendo así una regulación de la nivelación más efectiva. On the other hand, in relation to the cylinder (30), two detectors (32) can be arranged at both ends, whereby the device is similarly sensitive in the inclination towards both sides, thus allowing a more leveling regulation. effective.

Claims

R E I V I N D I C A C I O N E S
1. - Máquina para esparcir materiales de pavimentación, en particular para el esparcimiento de materiales superficiales sobre una capa de hormigón fresco, caracterizada en que se constituye por un conjunto portante (1) provisto con ruedas (2) , sobre el cual va dispuesta en montaje giratorio una plataforma (4) que soporta a un brazo telescópico (8) provisto en el extremo con un cabezal (9) de descarga, yendo además sobre la plataforma (4) una cuba-depósito (7) dispuesta en montaje giratorio para mezclar materiales y un husillo transportador (19) que permite llevar los materiales desde la mencionada cuba-depósito (7) hasta el cabezal (9) .1. - Machine for spreading paving materials, in particular for spreading surface materials on a layer of fresh concrete, characterized in that it is constituted by a bearing assembly (1) provided with wheels (2), on which it is arranged in rotating assembly a platform (4) that supports a telescopic arm (8) provided at the end with a discharge head (9), also going on the platform (4) a tank-tank (7) arranged in a rotating assembly to mix materials and a conveyor spindle (19) that allows materials to be carried from the aforementioned tank tank (7) to the head (9).
2. - Máquina para esparcir materiales de pavimentación, en todo de acuerdo con la primera reivindicación, caracterizada en que el cabezal (9) comprende una tolva (14) provista con una salida inferior de descarga de los materiales, en relación con la cual van dispuestos unos rodillos giratorios (15 y 16) que determinan la salida dosificada de los materiales , actuándose el accionamiento de dichos rodillos (15 y 16) por el fluido de retorno de los medios accionadores de la extensión del brazo (8) , para determinar la dosificación de descarga de los materiales en función del desplazamiento del cabezal (9) mediante el brazo (8) en la recogida de éste.2. - Machine for spreading paving materials, in all according to the first claim, characterized in that the head (9) comprises a hopper (14) provided with a lower discharge outlet of the materials, in relation to which they are arranged rotating rollers (15 and 16) that determine the dosed output of the materials, the driving of said rollers (15 and 16) being activated by the return fluid of the actuating means of the arm extension (8), to determine the Discharge dosage of the materials depending on the displacement of the head (9) by means of the arm (8) in its collection.
3. - Máquina para esparcir materiales de pavimentación, en todo de acuerdo con la primera y segunda reivindicaciones, caracterizada en que el cabezal (9) puede ir dispuesto en posición fija respecto del brazo telescópico (8) o según un acoplamiento en articulación (21) con posibilidad de accionamiento de orientación mediante un accionador (22) .3. - Machine for spreading paving materials, in all according to the first and second claims, characterized in that the head (9) can be arranged in a fixed position with respect to the telescopic arm (8) or according to a joint coupling (21 ) with the possibility of orientation actuation by means of an actuator (22).
4. - Máquina para esparcir materiales de pavimentación, en todo de acuerdo con la primera a tercera reivindicaciones, caracterizada en que la sujeción del cabezal con respecto al brazo telescópico (8) se establece según una disposición de colgado, mediante soportes formados por dos placas (24 y 25) conformadas de manera contrapuesta, la una con el borde superior y la otra con el borde inferior en forma de gancho (26) , para un acoplamiento por encaje entre ellas .4. - Machine for spreading materials paving, in all according to the first to third claims, characterized in that the clamping of the head with respect to the telescopic arm (8) is established according to a hanging arrangement, by means of supports formed by two plates (24 and 25) shaped so opposed, one with the upper edge and the other with the lower edge in the form of a hook (26), for a coupling by fit between them.
5. - Máquina para esparcir materiales de pavimentación, en todo de acuerdo con la primera reivindicación, caracterizada en que relacionado con el brazo telescópico (8) se incorpora un dispositivo de regulación de la nivelación de dicho brazo (8) , comprendiendo dicho dispositivo un cilindro hueco (30) , en cuyo interior va una bola metálica (31) con libertad de movimiento, mientras que en al menos uno de los extremos del cilindro (30) va dispuesto un detector electromagnético (32) capaz de acusar el contacto de la bola (31) , dando lugar a una señal que permite activar los medios (29) de basculación del brazo (8) para la nivelación de éste; yendo el cilindro (30) sobre una placa soporte (34) que permite establecer la sujeción en la posición que convenga en función de una nivelación primaria de referencia. 5. - Machine for spreading paving materials, in all according to the first claim, characterized in that related to the telescopic arm (8) a leveling regulation device of said arm (8) is incorporated, said device comprising a hollow cylinder (30), inside of which a metal ball (31) with freedom of movement goes, while at least one of the ends of the cylinder (30) is arranged an electromagnetic detector (32) capable of accusing the contact of the ball (31), giving rise to a signal that allows activating the means (29) for tilting the arm (8) for leveling it; the cylinder (30) going on a support plate (34) that allows to establish the support in the position that is convenient according to a primary leveling of reference.
PCT/ES2003/000143 2002-05-27 2003-03-26 Machine for spreading paving materials WO2003100171A1 (en)

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ES200201346U ES1052554Y (en) 2002-05-27 2002-05-27 MACHINE TO SPREAD PAVING MATERIALS.

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AU2005269537B2 (en) 2004-07-26 2009-12-03 Somero Enterprises, Inc. Powered strike-off plow
CN111255209B (en) * 2020-02-17 2021-08-27 安徽旻扬建设工程有限公司 Paving method of interior decoration wood floor
CN111287430A (en) * 2020-02-19 2020-06-16 广东博智林机器人有限公司 Automatic material spreading device and material spreading robot

Citations (4)

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Publication number Priority date Publication date Assignee Title
US3756509A (en) * 1972-06-12 1973-09-04 R Hamnes Granulate spreader apparatus
US4019685A (en) * 1975-10-31 1977-04-26 Dempster Industries, Inc. Apparatus for synchronizing the speed of a material spreader or the like with the speed of a vehicle upon which it is mounted
US5039249A (en) * 1989-08-18 1991-08-13 Hansen Joel D Apparatus for screening and trowelling concrete
GB2344296A (en) * 1998-10-08 2000-06-07 E S T Limited Vehicle comprising apparatus for making foamed concrete

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756509A (en) * 1972-06-12 1973-09-04 R Hamnes Granulate spreader apparatus
US4019685A (en) * 1975-10-31 1977-04-26 Dempster Industries, Inc. Apparatus for synchronizing the speed of a material spreader or the like with the speed of a vehicle upon which it is mounted
US5039249A (en) * 1989-08-18 1991-08-13 Hansen Joel D Apparatus for screening and trowelling concrete
GB2344296A (en) * 1998-10-08 2000-06-07 E S T Limited Vehicle comprising apparatus for making foamed concrete

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ES1052554Y (en) 2003-10-16
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