Patent US3905436A successfully refreshed from Google Patents.
US3905436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable wheelchair
Assignee: Wheelchairs Inc
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Filing: 1974-04-22
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Granted: 1975-09-16
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Expires: 1994-04-22
Abstract
Abstract An adjustable wheelchair includes A. A CARRIAGE INCLUDING SUPPORT WHEELS, B. A SEAT AND A SUPPORT FRAME THEREFOR, C. A MOTOR DRIVEN ELEVATOR AND GUIDES FOR SUPPORTING THE SEAT AND FRAME FOR MOVEMENT RELATIVE TO THE CARRIAGE WHILE MAINTAINING THE FRAME AND SEAT FIRMLY CONNECTED WITH THE CARRIAGE, AND D. THE FRAME INCLUDES A PORTION PROXIMATE THE SEAT CONFIGURED FOR RETENTION BY CHAIR RETAINING STRUCTURE INTEGRAL WITH A MOTOR VEHICLE BODY IN RESPONSE TO SEAT AND FRAME MOVEMENT RELATIVE TO THE CARRIAGE.
Inventors
- 👤 Jr Andrew Karchak
- 👤 James R Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:37
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/24; B60N2/245; A; A61; A61G; A61G3/00; A61G3/02; A61G3/06; A61G3/063; A61G5/00; A61G5/10; A61G5/12; A61G5/125; A61G5/128; A61G2220/00; A61G2220/14; A61G2220/145; A61G5/04; A61G5/041; A61G5/045; A61G5/1056; A61G5/1059; Y; Y10; Y10S; Y10S180/00; Y10S180/907; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
141 words
In an adjustable wheelchair, a. a carriage including support wheels, b. a seat and a support frame therefor, c. means supporting the seat and frame for movement relative to the carriage while maintaining the frame and seat firmly connected with the carriage, said means including a motor driven elevator mounted on the carriage and connected with the frame to raise and lower the seat, and linear guides also mounted on the carriage and connected with the frame to guide said raising and lowering of the seat and to block lateral movement of the seat and frame relative to the carriage, and d. the frame including a portion proximate the seat configured for retention by chair retaining structure integral with a motor vehicle body in response to said seat and frame movement relative to the carriage, said portion integral with the frame.
Claim 2
Dependent Claim
141 words
In an adjustable wheelchair, a. a carriage including support wheels, b. a seat and a support frame therefor, c. means supporting the seat and frame for movement relative to the carriage while maintaining the frame and seat firmly connected with the carriage, said means including a motor driven elevator mounted on the carriage and connected with the frame to raise and lower the seat, and linear guides also mounted on the carriage and connected with the frame to guide said raising and lowering of the seat and to block lateral movement of the seat and frame relative to the carriage, and d. the frame including a portion proximate the seat configured for retention by chair retaining structure integral with a motor vehicle body in response to said seat and frame movement relative to the carriage, said portion integral with the frame.
Claim 3
Dependent Claim
34 words
The combination that includes the wheelchair of claim 1 together with said structure having the form of channels located to receive said portion having the form of rails at opposite sides of the seat.
Claim 4
Dependent Claim
23 words
The combination that includes the wheelchAir and structure of claim 2 together with said motor vehicle body rigidly supporting said chair retaining structure.
Claim 5
Dependent Claim
26 words
The wheelchair of claim 1 including a drive means connected with said wheels for controllably rotating the wheels to advance the wheelchair in a selected direction.
Claim 6
Dependent Claim
53 words
The wheelchair of claim 4 wherein said drive means includes two endless flexible drive elements each operatively connected with a motor driven rotor and a wheel driving rotor, and means adjustably pivotally supporting the motors to control element tension, thereby to enable and disable the transmission of drive to the wheel driving rotors.
Claim 7
Dependent Claim
159 words
In an adjustable wheelchair, a. a carriage including support wheels, b. a seat and a support frame therefor, c. means supporting the seat and frame for movement relative to the carriage while maintaining the frame and seat firmly connected with the carriage, said means including a motor driven elevator mounted on the carriage and connected with the frame to raise and lower the seat, and linear guides also mounted on the carriage and connected with the frame to guide said raising and lowering of the seat and to block lateral movement of the seat and frame relative to the carriage, and d. a foot rest, and a linkage operatively connecting the foot rest with the frame and carriage to raise the foot rest relative to the seat in response to lowering of the seat relative to the carriage, and to lower the foot rest relative to the seat in response to raising of the seat relative to the carriage.
Claim 8
Dependent Claim
159 words
In an adjustable wheelchair, a. a carriage including support wheels, b. a seat and a support frame therefor, c. means supporting the seat and frame for movement relative to the carriage while maintaining the frame and seat firmly connected with the carriage, said means including a motor driven elevator mounted on the carriage and connected with the frame to raise and lower the seat, and linear guides also mounted on the carriage and connected with the frame to guide said raising and lowering of the seat and to block lateral movement of the seat and frame relative to the carriage, and d. a foot rest, and a linkage operatively connecting the foot rest with the frame and carriage to raise the foot rest relative to the seat in response to lowering of the seat relative to the carriage, and to lower the foot rest relative to the seat in response to raising of the seat relative to the carriage.
Claim 9
Dependent Claim
134 words
In an adjustable wheelchair, a. a carriage including support wheels, b. a seat and a support frame therefor, and c. means supporting the seat and frame for movement relative to the carriage while maintaining the frame and seat firmly connected with the carriage, d. the frame including a portion proximate the seat configured for retention by chair retaining structure integral with a motor vehicle body in response to said seat and frame movement relative to the carriage, said portion comprising rails at opposite sides of the seat, the chair having arm rests extending in generally horizontal positions above the level of said rails, and means hinging the arm rests to the frame for swinging movement away from said positions so that the wheelchair occupant may freely steer said motor vehicle without arm rest obstructions.
Claim 10
Dependent Claim
134 words
In an adjustable wheelchair, a. a carriage including support wheels, b. a seat and a support frame therefor, and c. means supporting the seat and frame for movement relative to the carriage while maintaining the frame and seat firmly connected with the carriage, d. the frame including a portion proximate the seat configured for retention by chair retaining structure integral with a motor vehicle body in response to said seat and frame movement relative to the carriage, said portion comprising rails at opposite sides of the seat, the chair having arm rests extending in generally horizontal positions above the level of said rails, and means hinging the arm rests to the frame for swinging movement away from said positions so that the wheelchair occupant may freely steer said motor vehicle without arm rest obstructions.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |