US4685693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Upright wheelchair
Assignee: Individual
•
Filing: 1986-09-16
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Granted: 1987-08-11
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Expires: 2006-09-16
Abstract
Abstract An upright wheelchair that allows the user to be in an upright standing position in the chair and self-propel the chair from that position by use of auxiliary drive wheels inner-connected with the main wheels. An enlarged chair back provides vertical support for the user and is pivoted for horizontal positioning with a fold-out support.
Inventors
- 👤 Carl F. Vadjunec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:05
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/14; A61G5/02; A61G5/024; A61G5/026; A61G5/1091; Y; Y10; Y10S; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
An upright wheelchair having a main support frame, with upstanding side frame configurations, main support wheels and multiple directional wheels on said main support frame, a back body support pivotally secured between said upstanding side frame configurations, inner-drive wheels secured in spaced relation to said main support wheels, secondary drive wheels vertically aligned with said inner-drive wheels and rotatably engaging same in reverse direction and said main support wheels, means on said back body support for locking same in vertical position, means on said back body support for supporting same in horizontal position, means for supporting a chair user in upright position on said back body support, secondary means for securing the user on said back body support, means for locking said main support wheels, inner-drive wheels and said secondary drive wheels.
Claim 2
Dependent Claim
132 words
An upright wheelchair having a main support frame, with upstanding side frame configurations, main support wheels and multiple directional wheels on said main support frame, a back body support pivotally secured between said upstanding side frame configurations, inner-drive wheels secured in spaced relation to said main support wheels, secondary drive wheels vertically aligned with said inner-drive wheels and rotatably engaging same in reverse direction and said main support wheels, means on said back body support for locking same in vertical position, means on said back body support for supporting same in horizontal position, means for supporting a chair user in upright position on said back body support, secondary means for securing the user on said back body support, means for locking said main support wheels, inner-drive wheels and said secondary drive wheels.
Claim 3
Dependent Claim
43 words
The upright wheel chair of claim 1 wherein said means on said back body support for locking same in vertical position comprises a body support lock and a retaining clamp extending from said back body support and engageable on said main support frame.
Claim 4
Dependent Claim
35 words
The upright wheel chair of claim 1 wherein said means for supporting said back body support in horizontal position comprises a back support leg deployable from said back body support and engageable with the ground.
Claim 5
Dependent Claim
31 words
The upright wheel chair of claim 1 wherein said means for supporting a chair user in an upright position on said back body support comprises side body supports and multiple straps.
Claim 6
Dependent Claim
31 words
The upright wheel chair of claim 1 wherein said means for locking said main support wheels comprises a brake assembly on said main support frame engageable on the main support wheels.
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) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |