Patent US3896891A successfully refreshed from Google Patents.
US3896891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular motorized wheel chair
Assignee: STAINLESS MEDICAL PRODUCTS Inc
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Filing: 1973-08-31
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Granted: 1975-07-29
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Expires: 1993-08-31
Abstract
Abstract The specification discloses a motorized wheelchair which can be quickly and easily disassembled into separate lightweight components. The separate components can be conveniently stacked to minimize space requirements when transporting the chair from one location to another.
Inventors
- 👤 Edward W Miltenburg
- 👤 Donald L Whetstine
- 👤 Howard Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:39
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/04; A61G5/041; A61G5/045; A61G5/08; A61G5/0875; A61G5/0891; A61G5/10; A61G5/1054; A61G5/1091; A61G2203/00; A61G2203/10; A61G2203/14; Y; Y10; Y10S; Y10S180/00; Y10S180/907; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
321 words
A wheelchair comprising: a left side module including a left frame, a left rear drive wheel having a horizontal axis of rotation and a castor mounted front wheel; a first motor and a means for connecting the output of said first motor to said left rear drive wheel; a right side module including a right frame, a right rear drive wheel having a horizontal axis of rotation and a castor mounted front wheel; a second motor and a means for connecting the output of said second motor to the right rear drive wheel; a seat comprised of a bucket shaped back module and a bucket shaped bottom module; means for attaching said seat to said left and right frames so as to enable said seat to be easily and quickly detached from said frames said means comprising: a pair of substantially vertical elongated projections on the bottom of said bucket shaped back module, said projections being spaced apart so as to be substantially coplanar with said left and right frames, and; a member of said left frame having an opening adapted to receive one of said bucket seat back projections, and; a member of said right frame having an opening adapted to receive the other of said bucket seat back projections; at least one pair of substantially vertical elongated projections on the bottom of said bucket shaped bottom, said projections being spaced apart so as to be substantially coplanar with said left and right side frames, and; a member of said left frame having an opening adapted to receive one of said bucket seat bottom projections; a member of said right frame having an opening adapted to receive the other of said bucket seat back projections; a battery support platform and means for attaching said battery support platform to said left and right frames so as to permit said battery support platform to be easily and quickly removed from said frames.
Claim 2
Dependent Claim
321 words
A wheelchair comprising: a left side module including a left frame, a left rear drive wheel having a horizontal axis of rotation and a castor mounted front wheel; a first motor and a means for connecting the output of said first motor to said left rear drive wheel; a right side module including a right frame, a right rear drive wheel having a horizontal axis of rotation and a castor mounted front wheel; a second motor and a means for connecting the output of said second motor to the right rear drive wheel; a seat comprised of a bucket shaped back module and a bucket shaped bottom module; means for attaching said seat to said left and right frames so as to enable said seat to be easily and quickly detached from said frames said means comprising: a pair of substantially vertical elongated projections on the bottom of said bucket shaped back module, said projections being spaced apart so as to be substantially coplanar with said left and right frames, and; a member of said left frame having an opening adapted to receive one of said bucket seat back projections, and; a member of said right frame having an opening adapted to receive the other of said bucket seat back projections; at least one pair of substantially vertical elongated projections on the bottom of said bucket shaped bottom, said projections being spaced apart so as to be substantially coplanar with said left and right side frames, and; a member of said left frame having an opening adapted to receive one of said bucket seat bottom projections; a member of said right frame having an opening adapted to receive the other of said bucket seat back projections; a battery support platform and means for attaching said battery support platform to said left and right frames so as to permit said battery support platform to be easily and quickly removed from said frames.
Claim 3
Dependent Claim
62 words
The apparatus recited in claim 1 wherein said means for attaching said battery support platform comprises: a pair of elongated substantially horizontal projections on said support platform and a member of said left frame having an opening adapted to receive one of said projections and a member of said right frame having an opening adapted to receive the other of said projections.
Claim 4
Dependent Claim
235 words
A wheelchair comprising: a left side module including a left frame, a left rear drive wheel having a horizontal axis of rotation, and a castor mounted front wheel; a right side module including a right frame, a right rear drive wheel having a horizontal axis of rotation and a castor mounted front wheel; a seat comprised of a back module and a bottom module; means for attaching said seat to said left and right frames so as to enable said seat to be easily and quickly detached from said frames, said means comprising: a pair of substantially vertical elongated projections on the bottom of said back module, said projections being spaced apart so as to be substantially coplanar with said left and right frames and; a member of said left frame having an opening adapted to receive one of said back module projections, and; a member of said right frame having an opening adapted to receive the other of said back module projections; at least one pair of substantially vertical elongated projections on the bottom of said bottom module, said projections being spaced apart so as to be substantially coplanar with said left and right side frames, and a member of said left frame having an opening adapted to receive one of said bottom module projections; a member of said right frame having an opening adapted to receive the other of said bottom module projections.
Claim 5
Dependent Claim
235 words
A wheelchair comprising: a left side module including a left frame, a left rear drive wheel having a horizontal axis of rotation, and a castor mounted front wheel; a right side module including a right frame, a right rear drive wheel having a horizontal axis of rotation and a castor mounted front wheel; a seat comprised of a back module and a bottom module; means for attaching said seat to said left and right frames so as to enable said seat to be easily and quickly detached from said frames, said means comprising: a pair of substantially vertical elongated projections on the bottom of said back module, said projections being spaced apart so as to be substantially coplanar with said left and right frames and; a member of said left frame having an opening adapted to receive one of said back module projections, and; a member of said right frame having an opening adapted to receive the other of said back module projections; at least one pair of substantially vertical elongated projections on the bottom of said bottom module, said projections being spaced apart so as to be substantially coplanar with said left and right side frames, and a member of said left frame having an opening adapted to receive one of said bottom module projections; a member of said right frame having an opening adapted to receive the other of said bottom module projections.
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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |