EP1635062A1 - Airless spray pump - Google Patents
Airless spray pump Download PDFInfo
- Publication number
- EP1635062A1 EP1635062A1 EP05077480A EP05077480A EP1635062A1 EP 1635062 A1 EP1635062 A1 EP 1635062A1 EP 05077480 A EP05077480 A EP 05077480A EP 05077480 A EP05077480 A EP 05077480A EP 1635062 A1 EP1635062 A1 EP 1635062A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- assembly
- pump
- inlet
- inlet tube
- yoke
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/04—Draining
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/20—Filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
Definitions
- An airless spray pump is provided with a single-acting piston pump which allows the use of a low-cost yoke drive. Motor and pump shaft are offset for most efficient force utilization.
- the main drive housing has a motor mounted to the rear thereof.
- a gear assembly uses gear teeth which are formed with a 5° helical angle and have a 25° pressure angle. This geometry combines the higher efficiency of straight cut gears with the noise reduction typified in a helical design.
- the pump rod is provided with a cap over the top end thereof which has bearing.
- Pump assembly is designed as a single acting pump, that is, the pump only pumps on the downward stroke and loads on the upward stroke. This allows the components of the drive train, including the yoke and gear, to be much lighter as the yoke ends up being more of a guidance device rather than a force-applying device.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
- Airless spray pumps for the spraying of paints and other coatings.
- Airless spray pumps for the spraying of paints and other coatings via the airless method are well known and have traditionally been divided into two types, diaphragm pumps for the lower end of the market and reciprocating piston pumps for the higher end.
- An airless spray pump is provided with a single-acting piston pump which allows the use of a low-cost yoke drive. Motor and pump shaft are offset for most efficient force utilization. The main drive housing has a motor mounted to the rear thereof. A gear assembly uses gear teeth which are formed with a 5° helical angle and have a 25° pressure angle. This geometry combines the higher efficiency of straight cut gears with the noise reduction typified in a helical design.
- An eccentric is molded onto the front of the gear assembly and has located thereabout a bearing assembly which rides inside a yoke. The yoke moves vertically on guide rods which are retained in pockets of the drive housing. The yoke is molded of plastic as is the gear assembly leading to lower cost and easier manufacture.
- The pump rod is provided with a cap over the top end thereof which has bearing. Pump assembly is designed as a single acting pump, that is, the pump only pumps on the downward stroke and loads on the upward stroke. This allows the components of the drive train, including the yoke and gear, to be much lighter as the yoke ends up being more of a guidance device rather than a force-applying device.
- The motor and pinion are offset from the centerline of the pump assembly. This arrangement does not have any significant cantilevering as the pump rod, pinion, yoke, eccentric and cap are all located in the same plane. The location of the rod and the single acting pump with respect to the gear centerline reduces the thrust loads on the yoke. The location of the pinion on the gear partially offsets and reduces the pump forces on the gear shaft and bearings. By locating the eccentric bearing directly on the end of the pump rod cap which is press-fit it eliminates the transfer of pumping force through an intermediate member such as the yoke which provides longer life, efficiency and allows the manufacture of a more inexpensive yoke assembly.
- The shaft packing assembly is comprised of a packing housing which screws into the pump housing and which contains a felt member which has been soaked with throat seal lubricant or other solvent or lubricant. A stack of v-packings are compressed in place by wave spring which is tightened by tightening the seal housing into the pump housing .
- The inlet check is provided with a check ball and a check seat which is pressed into a check housing and which is held in place by a retainer. These parts all press-fit into one another such that the complete assembly be merely screwed into main pump housing for replacement. Similarly, outlet check assembly is formed of an outlet check housing which is screwed into a pump housing and similarly is provided with a check ball held in place by a retainer. The outlet passageway is angled relative to the axis of the pump shaft. This allows the outlet check assembly to operate essentially via gravity and yet requires only the drilling and provision of one passageway while maintaining an essentially vertical ball-seat relationship.
- These and other objects and advantages of the invention will appear more fully from the following description made in conjunction with the accompanying drawings wherein like reference characters refer to the same or similar parts throughout the several views.
-
- FIG. 1 is a prospective exploded view showing the airless spray pump with the instant invention.
- FIG. 2 is a simple front plan view of the drive assembly and pump of the instant invention.
- FIG. 3 is a side plan view of the assembly shown in FIG. 1.
- FIG. 4 is a detailed exploded view of the circled area in FIG. 3.
- FIG. 5 is a cross-sectional view of the pump of the instant invention.
- FIG. 6 shows more details of the drive assembly of the instant invention.
- FIG. 7 is another cross-sectional view of the pump portion of the instant invention.
- FIG. 8 is a cross-section of the outlet filter of the instant invention.
- FIG. 9 is an exploded view of the outlet filter of the instant invention.
- FIG. 10 is a perspective exploded view of the instant invention.
- The instant invention generally designated 10 is comprised of a
main drive housing 12 having amotor 14 mounted to the rear thereof. Agear assembly 16 having arear bearing 17 andgear teeth 22 is inserted into the bearinghousing 20 ofdrive housing 12.Gear teeth 22 ongear assembly 16 mate with the teeth onpinion 24 on the end ofmotor 14. Theteeth 22 and onpinion 24 are formed with a 5° helical angle and have a 25° pressure angle. This geometry combines the higher efficiency of straight cut gears with the noise reduction typified in a helical design. - An eccentric 25 is also molded onto the front of
gear assembly 16 and has located thereabout abearing assembly 28 which rides inside ayoke 30. Yoke 30 moves vertically onguide rods 32 which are retained inpockets 34 ofdrive housing 12. Yoke 30 is molded of plastic.Gear assembly 16 is cast in ZA-12 with an integral counterweight leading to lower cost and easier manufacture. -
Pump rod 36 is provided with acap 38 over the top end thereof which has bearing upon it bearing 28.Pump assembly 40 is designed as a single acting pump that is the pump only pumps on the downward stroke and loads on the upward stroke. In doing so this allows the components of the drive train, including the yoke and gear, to be much lighter as theyoke 30 ends up being more of a guidance device rather than a force-applying device. - As can be seen more particularly in FIG. 2, motor and
pinion 24 are offset from thecenterline 42 ofpump assembly 40 which also has offset therefrom bearing 20 in the opposite direction. Also, this arrangement does not have any significant cantilevering as the pump rod, pinion, yoke, eccentric and cap are all located in the same plane. The location of the rod and the single acting pump with respect to the gear centerline reduces the thrust loads on the yoke. The location of the pinion on the gear partially offsets and reduces the pump forces on the gear shaft and bearings. By locating the eccentric bearing directly on the end of the pump rod cap which is press-fit it eliminates the transfer of pumping force through an intermediate member such as the yoke which provides longer life, efficiency and allows the manufacture of a more inexpensive yoke assembly. - The
shaft packing assembly 44 shown in FIG. 4 is comprised of apacking housing 46 which screws intopump housing 48 and which contains a feltmember 50 which has been soaked with throat seal lubricant or other solvent or lubricant. A stack of v-packings 52 are compressed in place bywave spring 54 which is tightened by tighteningseal housing 46 intopump housing 48. - Turning to FIG. 7,
inlet check 56 is provided with acheck ball 58, acheck seat 60 which is pressed intocheck housing 62 and which is held in place by retainer andintegral ball guide 64. These parts all press-fit into one another such that the complete assembly be merely screwed intomain pump housing 48 for replacement. Similarly, outlet check assembly is formed of anoutlet check housing 60 which is screwed intopump housing 48 and similarly is provided with acheck ball 62 held in place byball seat 65. As can also be seen in FIG. 7, theoutlet passageway 66 is angled relative to the axis ofpump shaft 36. This allows theoutlet check assembly 58 to operate essentially via gravity and yet requires only the drilling and provision of one passageway while maintaining an essentially vertical ball-seat relationship. - FIGs. 8 and 9 show the
outlet filter assembly 80 which is comprised of afilter element 82 contained inpassage 84 ofpump assembly 40 and which is retained by fitting 86. - Turning to FIG. 10,
inlet tube 70 is provided with a female threadedend 70a. Inletfilter screen assembly 72 has a male threadedend 72a for threaded engagement withend 70a.Ends screen assembly 72, attach a garden hose toinlet tube 70, turn on the water and flush out the assembly. - It is contemplated that various changes and modifications may be made to the airless spray pump without departing from the scope of the invention as defined by the following claims.
Claims (1)
- An airless spray pump having an inlet tube and an inlet filter screen, the improvement comprising said inlet tube being provided with a female threaded end and said inlet filer screen assembly being provided with a male threaded end threaded engagement with female end, said ends having the same size and thread as a common garden hose such that a user need merely remove said screen assembly and attach a garden hose to said inlet tube to flush out the assembly.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10184231.8A EP2280169B1 (en) | 1999-08-31 | 2000-08-28 | Airless spray pump |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15179499P | 1999-08-31 | 1999-08-31 | |
US16694699P | 1999-11-22 | 1999-11-22 | |
EP00961390A EP1208287B1 (en) | 1999-08-31 | 2000-08-28 | Airless spray pump |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00961390A Division EP1208287B1 (en) | 1999-08-31 | 2000-08-28 | Airless spray pump |
EP00961390.2 Division | 2000-08-28 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10184231.8 Division-Into | 2010-09-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1635062A1 true EP1635062A1 (en) | 2006-03-15 |
EP1635062B1 EP1635062B1 (en) | 2012-06-13 |
Family
ID=35883340
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05077480A Expired - Lifetime EP1635062B1 (en) | 1999-08-31 | 2000-08-28 | Airless spray pump |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1635062B1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4416588A (en) | 1980-07-18 | 1983-11-22 | Wagner Spray Tech Corporation | Air compressor for paint pumps |
US5567323A (en) * | 1995-04-06 | 1996-10-22 | Harrison-Pipkin, L.L.C. | Intake filter for a paint sprayer |
US5769321A (en) | 1996-02-20 | 1998-06-23 | Wagner Spray Tech Corporation | Yoke support for piston paint pumps |
US5842639A (en) * | 1997-07-25 | 1998-12-01 | Walker; Willis | Paint sprayer screen |
-
2000
- 2000-08-28 EP EP05077480A patent/EP1635062B1/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4416588A (en) | 1980-07-18 | 1983-11-22 | Wagner Spray Tech Corporation | Air compressor for paint pumps |
US5567323A (en) * | 1995-04-06 | 1996-10-22 | Harrison-Pipkin, L.L.C. | Intake filter for a paint sprayer |
US5769321A (en) | 1996-02-20 | 1998-06-23 | Wagner Spray Tech Corporation | Yoke support for piston paint pumps |
US5842639A (en) * | 1997-07-25 | 1998-12-01 | Walker; Willis | Paint sprayer screen |
Also Published As
Publication number | Publication date |
---|---|
EP1635062B1 (en) | 2012-06-13 |
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