US4475613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power operated chair
Assignee: Individual
•
Filing: 1982-09-30
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Granted: 1984-10-09
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Expires: 2002-09-30
Abstract
Abstract A power operated chair having a base frame assembly, a chair assembly mounted on the base frame assembly, and an internal combustion engine mounted on the base frame assembly. A fuel tank is mounted on the back of the chair assembly. One or two rear drive wheels are rotatably mounted on a transversely extending rear axle that is supported from the base frame assembly. If one wheel is utilized it would be centrally positioned along the length of the rear axle and if two drive wheels are used they would be centrally placed along the length of the rear axle and close enough to each other so that a differential gear assembly would not be necessary between them. A pair of laterally spaced steerable front wheels are mounted to the forward end of the base frame assembly and a pair of laterally spaced rear wheels that are non-steerable are mounted to the rearward end of the base frame assembly. There is also a drive system connecting the internal combustion engine to the rear drive wheel. The drive wheel has a bottom surface spaced vertically lower than the bottom surface of each of the laterally spaced rear wheels so that when the power operated chair is oriented in a level state, the laterally spaced wheels do not touch the ground.
Inventors
- 👤 Thomas E. Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:43
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/04; A61G5/041; A61G5/045; A61G5/10; A61G5/1005; A61G5/1021; A61G5/1024; A61G5/1035; A61G5/1051; A61G5/1089; A61G5/12; A61G5/128; Y; Y10; Y10S; Y10S180/00; Y10S180/907
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
282 words
A power operated chair comprising: a base frame assembly; a chair assembly mounted on said base frame assembly; an internal combustion engine mounted on said power operated chair; a fuel tank mounted on said power operated chair; at least one rear drive wheel, said rear wheel rotatably mounted on a transversely extending rear axle that is supported from said base frame assembly; a pair of laterally spaced steerable front wheels and means mounting said front wheels to the forward end of said base frame assembly, the axis of rotation of said laterally spaced front wheels is located longitudinally forwardly of said chair assembly; a pair of laterally spaced rear wheels and means mounting them to the rearward end of said base frame assembly, said drive wheel being mounted inwardly of both of said laterally spaced rear wheels, said laterally spaced rear wheels being supported independently of each other and the axis around which these wheels rotate is rearwardly spaced from the axis about which said drive wheel rotates; a foot platform extending forwardly a predetermined distance from the front end of said base frame assembly, said foot platform also extending forwardly of said pair of laterally spaced steerable front wheels to form a protective barrier for said front wheels and also the feet of the person riding said power operated chair; a disc brake assembly mounted on said rear axle; a foot brake assembly comprising a foot brake pedal pivotally mounted on said foot platform, and connecting rod means whose forward end is connected to said foot pedal and whose rearward end is connected to said disc brake assembly; and drive means connecting said internal combustion engine to said rear drive wheel.
Claim 2
Dependent Claim
282 words
A power operated chair comprising: a base frame assembly; a chair assembly mounted on said base frame assembly; an internal combustion engine mounted on said power operated chair; a fuel tank mounted on said power operated chair; at least one rear drive wheel, said rear wheel rotatably mounted on a transversely extending rear axle that is supported from said base frame assembly; a pair of laterally spaced steerable front wheels and means mounting said front wheels to the forward end of said base frame assembly, the axis of rotation of said laterally spaced front wheels is located longitudinally forwardly of said chair assembly; a pair of laterally spaced rear wheels and means mounting them to the rearward end of said base frame assembly, said drive wheel being mounted inwardly of both of said laterally spaced rear wheels, said laterally spaced rear wheels being supported independently of each other and the axis around which these wheels rotate is rearwardly spaced from the axis about which said drive wheel rotates; a foot platform extending forwardly a predetermined distance from the front end of said base frame assembly, said foot platform also extending forwardly of said pair of laterally spaced steerable front wheels to form a protective barrier for said front wheels and also the feet of the person riding said power operated chair; a disc brake assembly mounted on said rear axle; a foot brake assembly comprising a foot brake pedal pivotally mounted on said foot platform, and connecting rod means whose forward end is connected to said foot pedal and whose rearward end is connected to said disc brake assembly; and drive means connecting said internal combustion engine to said rear drive wheel.
Claim 3
Dependent Claim
55 words
A power operated chair as recited in claim 1 wherein said chair assembly comprises a plurality of support legs, a seat unit mounted on said legs, a back rest unit mounted at the rear of said seat unit and a pair of laterally spaced arm supports mounted on opposite lateral sides of said seat unit.
Claim 4
Dependent Claim
55 words
A power operated chair as recited in claim 1 wherein said drive wheel has its bottom surface spaced vertically lower than the bottom surface of each of said laterally spaced rear wheels so that when the power operated chair is oriented in a level state, said laterally spaced rear wheels do not touch the ground.
Claim 5
Dependent Claim
31 words
A power operated chair as recited in claim 1 wherein said base frame assembly comprises two laterally spaced longitudinally extending side members, a front cross member, and a rear cross member.
Claim 6
Dependent Claim
39 words
A power operated chair as recited in claim 1 wherein there are at least two drive wheels and they are positioned laterally adjacent each other on said axle, thereby, eliminating the need for a differential gear assembly between them.
Claim 7
Dependent Claim
23 words
A power operated chair as recited in claim 1 wherein the overall width of said power operated chair is less than twenty-eight inches.
Claim 8
Dependent Claim
24 words
A power operated chair as recited in claim 1 further comprising steering means for said front wheels that will turn both wheels in unison.
Claim 9
Dependent Claim
30 words
A power operated chair as recited in claim 7 wherein said steering means has a steering handle having a hand throttle mounted adjacent the top end of said steering handle.
Claim 10
Dependent Claim
72 words
A power operated chair as recited in claim 7 wherein said steering means comprises a tie rod whose opposite ends are connected to brackets attached to the respective front wheels, an upright steering handle has its bottom end pivotally connected to said tie rod, spaced upwardly from the bottom end of said steering handle it is also connected to a fixed axis of a bracket rigidly connected to said base frame assembly.
Claim 11
Dependent Claim
78 words
A power operated chair as recited in claim 1 wherein said drive means comprises a sprocket gear mounted on said rear axle, a transversely extending forward axle that is supported from said base frame assembly, a sprocket gear and a pulley mounted on said forward axle, a drive chain passing around said two sprocket gears, a pulley and clutch mounted on the drive shaft of said internal combustion engine, and a fan belt passing around said two pulleys.
Claim 12
Dependent Claim
34 words
A power operated chair as recited in claim 1 wherein the height of said base frame assembly above ground level is less than ninety (90) percent of the height of said rear drive wheel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |