US 2500559 A
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Description (OCR text may contain errors)
March 14, 1950 K. C. MILLER LADDER PLATFORM Filed Dec. 17. 1946.
IN VEN TOR. Ennefh Cflillc Patented Mar. 14, 1950 UNITED STATES PATENT OFFICE LADDER PLATFORM Kenneth CpMiller, Kenosha, Wis.
Application December 17, 1946, Serial No. 716,869
My invention relates to attachments, or platforms .for ladders and has for its" object, to provide a novel step, or support designed and constructed to be secured to two adjacent rungs of a "ladder, to serve as a platform upon which a workman may stand securely, the platform being flat and having the advantage of relieving strain exerted upon the arches of the feet when a person stands upon an ordinary ladder rung for any length of time.
An important object of my invention is a support of the aforementioned character, which can be readily secured in various positions and attached to 'any'two adjacent rungs, the base thereof being jpivotably, or articulately secured to one rang, and the swinging hook means being attachable, adjustably to the adjacent rung immediately thereabove.
Another object of my invention is to provide a platform of the aforementioned character, wherein the hook supporting means is adjustable to various triangulated positions by means of notched formations in the side flanges of the said platform engaging the cross-connection between the hook attaching or supporting means.
Afurther object of my inventionis to provide locking means for securing the hook element in any desired notched portion.
Another object of my invention is to provide hook means which is adjustably positionable with respect to one edge of theplatform, it beingsecured in notched means; "the hook means being provided with steadying lock lugs to engage the edge of the recessed portion below the said notched "means in the side flanges of the said platform. I
A further object of my invention is to provide a. support or platform of the aforementioned character, which is practical in its construction, eflicient in its operation and use, and of such simple, elemental construction as to warrant economicalmanufacture thereof in quantity production.
Other features, ancillary objects, and inherent advantages resident in my invention will become apparent from an examination of the accompanying drawings wherein like symbols are used to designate like parts, and .in which;
:Eig.i1;is a perspective view of a ladder,.11auing my support attached thereto, and showing a person standing comfortably thereupon.
Fig. 2 is an end view of my invention.
Fig. 3 is a top view of my invention.
Fig. 4 is a fragmentary, and enlarged, cross- Y 2 sectional view taken substantially on the lines 44 of Fig. 3.
Fig. 5 is a fragmentary, perspective View showing a slightly modified form of hook hanging means.
Referring to the various views, the ladder is generally designated 6, and consists of the side frames 21 assembled firmly and securely to the rungs '1 indicated thereon.
My invention is generally designated 9, and in Fig. 1 it is shown how the feet 8 ofla workman, standing on my platform, are conveniently positioned and supported, relieving strain .dueto standing on rungsof round, or other shape, which furnish only support for a portion of the toot, as-compared to the complete and firm support of the feet provided by my invention generally designated 9. Y
The structure of my invention consists of a platform H], which may be made of metal, Wood, laminated wood, or any other suitable material, andhas a top portion, provided with flanges i3 and I2 formed downwardly at the sides of the upper portion 10. The upper part W has also a series of indentations o-r corrugations 14 which will-preventa-workman standing thereupon, from slipping.
At the sides, or flanges l3, recesses 21 are formed, the upper portions thereof being subdivided into a series of notches '23 for engagi g the connecting portion as of the 'U-shaped hooklike structure l1 assembled adjustably to'the platform It.
The hanging means I 1, is provided with loope portions l8 which fit over the rung of a ladder; and are positionable in any of the notcl'ies 23 so as to properly extend-the platform rearwardly of the ladder, when the platform It has its recessed portion-'25 engaging one of the adjacent rungs. *The hanging means 1? is then positioned in'the proper notch 23 to formideal triangulating connection tor --the loop portions is to hang on the rung I immediately thereabove so as :to per-- The'crossmo'nnection t9 "has secured-thereto the eye 20, having a threaded extension 2! engaged by the wing nut 22, which operates slidably for adjustabl purposes within the recessed elongated slotted portion :16, having a formed or indented portion 15, so as to permit the wing nut 22 to remain submerged below the working surface, or the support surface It). Hence, when the hook means I! is adjusted to proper triangulation to provide a horizontal position for the platform It), the nut 22 is suitably tightened.
The hanging means I1, by virtue of its articulate connection at I9 within the eye 20, is per-'- mitted to be articulated within the eye portion whenever it is necessary to remove the hook means, or loop portions 18, when it is desired to remove the platform from the ladder, or when it is desired to change its position to a higher pair of rungs, or to a lower position.
Another slight modification of my construction is indicated in Fig. wherein the hanging means I! having the cross-connection I9 is provided with a knee, or foot 25' at each end, each foot 25 having its terminus 26 in engagement with the surface 28 of the slotted structure 24 andv immediately below the notched formations 23, so that by moving the hanging means 11 to the position shown in dotted lines, or phantom lines, the same may be readily disengaged from a notch 23, and brought into engagement with another notch 23. Upon the assumption of the proper triangulated relationship of the hanging means I7, with respect to the platform It, the terminus 26 will engage the surface 28 and thus cause a locking action, or arrangement, preventing accidental dislodgement or displacement of the support in use or operation.
The platform is provided with the recessed portion 25 at the opposite edge which is made to rest or articulate on th rung 1 of the ladder 6.
Although, I have herein described, rather succinctly, the nature of the construction and operation of my invention, and inasmuch as the same is susceptible to modifications, alterations and improvements, I herein reserve the right to all improvements and modifications coming within the scope and spirit of my invention, as well as any that may be embraced in the accompanying drawings, and all those that may fall within the purview of the foregoing description; my invention to be limited only by the subjoined claims.
Having thus described and revealed my invention, what I claim as novel and desire to secure by Letters Patent, is:
1. A ladder attachment comprising, a platform provided with recessed means adapted to be removably and articulately secured to the rung of a ladder, U-shaped hook means having its base articulately secured to the said platform and its upright portions terminating in loop portions removably attachable to a rung immediately above the said first-mentioned rung, and locking means for rigidly securing the said U-shaped hook means to the said platform to prevent accidental displacement thereof, the said locking means comprising an elongated slotted portion having a straight base portion and a serrated upper portion disposed in parallelrelationship, foot portions at each end of the base of the said U- shaped hook means disposed at right angles to the plane of the said U-shaped hook means and adapted to engage the said base portion when the upright leg portions of the said U-shaped hook means are moved in one direction about the said U-shaped hook means as an axis andsimultaneously causing thebase of the said U- 4 shaped hook means to engage selectively a particular serration of the said serrated upper portion thus resulting in varied triangulated positions of the said ladder the said platform and the said U-shaped hook means, subsequently the movement of the said upright leg portions in a direction opposite the said one direction while the said base of the said U-shaped hook means is in pivotal engagement with the said particular serration eflectuating release of the said foot portions from engagement with the said base portion simultaneously permitting release of the base of the said U-shaped hook means from engagement with the said serrated upper portion.
2. A ladder attachment comprising, a platform provided with recessed means adapted to be removably and articulately secured to the rung of a ladder, U-shaped hook means having its base articulately secured to the said platform and its upright portions terminating in loop portions removably attachable to a rung immediately above the said first-mentioned rung, the said hook means the said platform and the said rungs being disposed in triangulated relationship, and locking means for rigidly securing the said U- shaped hook means to the said platform to prevent accidental displacement thereof, the said locking means comprising an elongated slotted portion having a straight base portion and a serrated upper portion disposed in parallel relationship, foot portions at each end of the base of the said U-shaped hook means disposed at right angles to the plane of the said U-shaped hook means and adapted to engage the said base portion when the upright leg portions of the said U-shaped hook means are moved in one direction about the said U-shaped? hook means as an axis and simultaneously causing the base of the said U-shaped hook means to engage selectively a particular serration of the said serrated upper portion thus resulting in varied triangulated positions of the said ladder thesaid platform and the said U-shaped hook means, subsequently the movement of the said upright leg portions in a direction opposite the said one direction while thesaid base of the .said U- shaped hook means is in pivotal engagement with the said particular serration efiectuating release of the said foot portions from engagement with the said base portion simultaneously permitting release of the base of the said U-shaped hook means from engagement with the said serrated upper portion.
KENNETH C. MILLER.
REFERENCES CITED The following references are of record in the file of this (patent: