US4373756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheelchair tray assembly
Assignee: Individual
•
Filing: 1980-10-16
•
Granted: 1983-02-15
•
Expires: 2000-10-16
Abstract
Abstract A wheelchair tray assembly is provided which includes spring biased hook elements to secure a tray to the arms of a wheelchair. The tray is mounted to tray supports which permit movement of the tray perpendicular to the direction of movement of the hook elements. The entire unit when collapsed is substantially the same size as a conventional cafeteria tray.
Inventors
- 👤 Geoffrey H. Purdy
- 👤 Robert R. Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:47
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/1094; A47; A47C; A47C7/00; A47C7/62; A47C7/68; Y; Y10; Y10S; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
78 words
A removable wheelchair tray assembly comprising: a first pair of male and female telescoping members, said male and female members each having a free end; spring means biasing said male and female members free ends toward one another; wheelchair arm engaging hook means secured to each of said free ends; tray support means movably secured to one of said members and adapted to move transversely with respect to said member; and a tray secured to said support means.
Claim 2
Dependent Claim
78 words
A removable wheelchair tray assembly comprising: a first pair of male and female telescoping members, said male and female members each having a free end; spring means biasing said male and female members free ends toward one another; wheelchair arm engaging hook means secured to each of said free ends; tray support means movably secured to one of said members and adapted to move transversely with respect to said member; and a tray secured to said support means.
Claim 3
Dependent Claim
82 words
The assembly in accordance with claim 1 further comprising: a second pair of male and female telescoping members parallel to and spaced apart from said first pair of members; and, said arm engaging hook means includes a transverse rod extending between said male member free ends, a transverse rod extending between said female member free ends, and hook elements on said male transverse member directed toward said female transverse member and on said female transverse member directed toward said male transverse member.
Claim 4
Dependent Claim
28 words
The assembly in accordance with claim 2 further comprising spring means biasing the free ends of said second pair of telescoping male and female members toward each other.
Claim 5
Dependent Claim
20 words
The assembly in accordance with claim 2 wherein said transverse rods underlie said tray when said spring means is relaxed.
Claim 6
Dependent Claim
65 words
The assembly in accordance with claim 2 wherein said tray support comprises a spaced apart pair of parallel members extending perpendicular to said first and second pair of male and female members, each of said pair of parallel members being slidingly secured to said first and second male members and to said tray to permit sliding movement in a direction perpendicular to said telescoping members.
Claim 7
Dependent Claim
56 words
The invention in accordance with claim 5 further comprising stop means secured to said tray and captured between said male telescoping members to limit the movement of said tray so that said telescoping members and support members underlie said tray when said spring means is relaxed and said stop engages one of said male telescoping members.
Claim 8
Dependent Claim
36 words
The invention in accordance with claim 1 wherein said hook means comprises a set of six hook elements capable of supporting said tray assembly on a flat surface in a plane parallel to said flat surface.
References Cited (Backward Citations)
US1008037A
Cited
US1882264A
Cited
FR1460533A
Cited
US3383134A
Cited
US3606450A
Cited
US3860285A
Cited
US4081198A
Cited
US4266825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |