|Número de publicación||US3338627 A|
|Tipo de publicación||Concesión|
|Fecha de publicación||29 Ago 1967|
|Fecha de presentación||13 May 1966|
|Fecha de prioridad||13 May 1966|
|Número de publicación||US 3338627 A, US 3338627A, US-A-3338627, US3338627 A, US3338627A|
|Cesionario original||Memorial Hospital|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (6), Citada por (17), Clasificaciones (10)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
Aug. 29, 1967 H. FRANK WHEELCHAIR APPARATUS Filed May 13, 1966 INVENTOR Herman FlO/M BY y M ATTORNEY United States Patent 3,338,627 WHEELCHAIR APPARATUS Herman Frank, The Memorial Hospital, Albany, N.Y. 12204 Filed May 13, 1966, Ser. No. 549,951 11 Claims. (Cl. 297-153) ABSTRACT OF THE DISCLOSURE Foldable tray appartus for use in a wheelchair to bear items, the day being attachable to the wheelchair by two pairs of lugs, one pair of lugs'secured to the side arms of the wheelchair and the second pair of lugs shaped to engage front vertical supports of the wheelchair. The tray The present invention relates to wheelchairs and the like, and more particularly, to an improved detachable tray for mounting on the arms of sucha vehicle. Those people who deemed it necessary or desirable to utilize a wheelchair, have found that it would be convenient to have a collapsible tray that could'be firmly attached to the wheelchair for carrying or bearing anyone of a number of items. It is the purpose of the present invention to provide such a collapsible tray where a firm single planar upper surface is provided, and the tray for all practical purposes, is locked into position relative to the wheelchair. To attain this, the present invention contemplates a pair of leaves defining the tray, the leaves being pivotally secured together and adapted to mate in overlapping fashion to form a tray having a single planar upper surface. Where the leaves are joined, the tray is provided with a locking mechanism to prevent an accidental pivotable action. The tray is secured to the wheelchair by two pairs of lugs, one pair of which engage the side arms of the wheelchair. The second pair of lugs is so shaped to engage the front support legs of the wheelchair to firmly secure the tray thereto and simultaneously prevent further outward movement of the tray.
An object of the present invention is to provide a tray of the type indicated, which is constructed and arranged so it may be readily attached to virtually any type of wheelchair or similar item having arm rests.
Another object of the present invention is to provide a tray for attachment to and detachment from a wheelchair and the like, which tray is foldable, and compact in nature.
A further object of the present invention is to provide a tray for attachment to a wheelchair and the like, which tray may be positively mounted relative thereto, yet readily detachable therefrom.
Yet another object of the present invention is an improved tray for wheelchairs and the like which tray is simple in construction, economical to manufacture, and efiicient in operation.
Other objects, advantages and capabilities or the present invention will become apparent from the following detail description, taken in conjunction with the accompanying drawings illustrating a preferred embodiment of the invention.
In the drawings:
FIGURE 1 shows a perspective view of the preferred form of the present invention as it is used with a wheelchair.
FIGURE 2 is a plan view of the underside of the present invention.
FIGURE 3 illustrates a side elevation of the present invention as it is half folded.
Referring to the drawings and more particularly to FIGURE 1, there is shown a conventional wheelchair having a seat 20, wheels 21 and horizontal armrests or side rails 22 and 22, the latter being secured to a pair of rear upstanding frame members 23 supporting a back member 24. The horizontal armrests. 22 and 22' are curved at the front in elbow like fashion at 25, and then extended downwardly respectively forming a pair of front vertical frame members 26 and 26'.
The present invention resides in the provision of a foldable tray 27 made from wood, metal, plastic or other suitable material, which may be detachably mounted on horizontal arms 22 and 22 of the wheelchair disclosed herein or a similar article. The tray, better shown in FIG- URES 2 and 3, is made of two leaves 28, 29 which are joined at one of their ends by a pair of strap hinges 31 thus allowing each of the leaves to be pivotable, as shown in FIGURE 3, and thereby folded side by side with each other to form a compact package. Where the two leaves are joined by the strap hinges, each is cutaway to form one of a pair of L shaped complementary recessed portions 32, which portions, when the leaves are pivoted about strap hinges 31, mate with each other in overlapping fashion, forming a flat planar surface defining tray 27.
Fastened at the bottom, toward each of the unjoined sides of leaves 28 and 29, are two pairs of angular ears or lugs 35, 36 and 37, 38, respectively. The tray is secured to the wheelchair by first holding it in the position shown in FIGURE 3, then positioning lugs 35, 36 to receive armrest 22 and positioning lugs 37, 38 to receive armrest 22, and simultaneously flattening the two leaves 28, 29 to form a level tray 27. It is observed that the forward surfaces of lugs 36 and 38, respectively engaging armrests 22 and 22, are cut-away in such a manner, as shown in FIGURES 1 and 2, that as the tray is pushed forward, lugs 36 and 38 will frictionally interlock to form a tight fit with the curved elbow like joints where the armrests meet the vertical frame members.
To prevent the two leaves from readily being separated by upward forces inducing pivotal motion about strap hinges 31, a brace 33 is pivotably mounted about a point 34 an inner edge of one of the leaves so that it may be rotated thereabout to firmly lock together the overlapping pieces of leaves 28 and 29 as shown in FIGURES 1 and 2.
Attention is drawn to the fact that when the tray is placed in a position such as that illustrated in FIGURE 1, a slight force will be introduced perpendicular to and horizontal with armrests 22 and 22' from lug pairs 35, 36 and 37, 38, respectively, so that the tray may be snugly secured thereto. If desired, the lugs may be slightly adjustable and/or spring biased lengthwise of the tray to accommodate the tray for use with wheelchairs of different widths.
It should be understood, of course, that the foregoing disclosure relates to only a preferred embodiment of the invention and that numerous modifications or alterations may be made therein without departing from the spirit and the scope of the invention, it is desired, therefore, that only such limitations be placed on the invention as are imposed by the prior art and as set forth in the appended claims.
It is claimed:
1. Attachable tray means for wheelchairs and the like and employed with side rails forming a part of the wheelchair at either side of the seat support the combination including a pair of leaves, means for pivotably joining the two leaves, means for locking the two leaves together to form a tray transversely spanning the distance between the side rails, support means attached to each one of said leaves for engaging each of the side rails to secure the tray thereto, and means for mating said leaves with each other in overlapping fashion to provide the tray with a single level upper surface.
2. Attachable tray means according to claim 1 wherein said locking means comprises a brace pivotably secured to one of said leaves and adapted to embrace an area where the leaves are joined together in overlapping fashion.
3. Attachable tray means according to claim 2 wherein said support means comprises a pair of lugs.
4. Attachable tray means according to claim 1 wherein the side rails are curved at a front end of the wheelchair in elbow like fashion, including means comprising a pair of lugs each partially cut-away for engaging said side rails at their curved portions and prevent further movement of the tray toward the front end of the wheelchair.
5. Attachable tray means according to claim 1 wherein said mating means comprises a pair of L-shaped complementary recessed portions provided where said leaves are joined together.
6. Attachable tray means for wheelchairs and the like employed with side rails forming a part of the wheelchair at either side of the seat support the combination including a pair of leaves, means for pivotably joining the two leaves, means for lockin-g the two leaves together to form a tray transversely spanning the distance between the side rails, support means attached to each one of said leaves for engaging each of the side rails to secure the tray thereto, said side rails being curved at a front end of the wheelchair in elbow like fashion, and means comprising a first pair of lugs each adapted to have a configuration for engaging one of said side rails at its curved portion to prevent further movement of the tray toward the front end of the wheelchair.
7. Attachable tray means according to claim 6 wherein said support means comprises a second pair of lugs.
8. Attachable tray means according to claim 6, including means for mating said leaves with each other in overlapping fashion to provide the tray with a single level upper surface.
9. Attachable tray means according to claim 8, wherein said mating means comprises a pair of L-shaped complementary recessed portions provided where said leaves are joined together.
10. Attachable tray means according to claim 9, wherein said locking means comprises a brace pivotably secured to one of said leaves and adapted to embrace an area where the leaves are joined together in overlapping fashion.
11. Attachable tray means according to claim 6 wherein the configuration for each of said lugs is L-shaped to engage one of said side rails comprising a rounded bar.
References Cited UNITED STATES PATENTS 297,219 4/1884 Anthony 108-l12 X 382,687 5/1888 Burlin 297-153 706,868 8/1902 Van Alstyne 10 81l2 1,851,600 3/1932 Stanley 108-112 X 2,115,323 4/1938 Wuest 1081 12 X 2,955,296 10/1960 Zapolski 4239 DAVID J. WILLIAMOWSKY, Primary Examiner.
JAMES T. MCCALL, Examiner.
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|Clasificación de EE.UU.||297/153, 211/149, D12/133, D06/406.3, 108/166|
|Clasificación internacional||A61G5/00, A61G5/10|
|Clasificación cooperativa||A61G5/10, A61G2005/1094|