Patent US4249774A successfully refreshed from Google Patents.
US4249774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Invalid chair
Assignee: Individual
•
Filing: 1979-02-22
•
Granted: 1981-02-10
•
Expires: 1999-02-22
Abstract
Abstract An invalid chair has a seat divided into a central saddle portion and a leg supporting portion. The saddle portion is rigidly connected with the backrest having two armrests. The leg supporting portion is hingedly connected at its front end to the base frame of the chair and a linkage is provided, so that when lifting the saddle portion it will leave the leg supporting portion and carry the person sitting on the saddle portion with his hands on the armrests until the legs of the person are substantially straightened out with his feet resting on the floor.
Inventors
- 👤 Sven A. G. Andreasson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:24
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/024; A61; A61G; A61G5/00; A61G5/10; A61G5/14; Y; Y10; Y10S; Y10S297/00; Y10S297/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
202 words
An invalid chair for facilitating a sitting person to stand and a standing person to sit comprising: a floor-engaging base frame; an upright backrest; armrests carried by said backrest; a seat having a saddle portion connected to said backrest so as to extend forwardly and generally horizontally therefrom, said seat also having a generally U-shaped leg-supporting portion, the contour of the interior of the U being generally complementary to said saddle portion and the legs of the U pointing toward said backrest; means pivotally mounting the ends of the legs of the U about an axis fixed with respect to said backrest, such that said seat portion is swingable in a vertical plane relative to said backrest and saddle portion; and power means connected between said base frame and said backrest and saddle portion for raising and lowering said backrest and saddle portion relative to said base frame whereby said leg supporting portion swings between a first position generally coextensive with said saddle portion when said backrest and saddle portion are in a lowered position and a second position inclined downwardly and forwardly with respect to said backrest and saddle portion when said backrest and saddle portion are in a raised position.
Claim 2
Dependent Claim
202 words
An invalid chair for facilitating a sitting person to stand and a standing person to sit comprising: a floor-engaging base frame; an upright backrest; armrests carried by said backrest; a seat having a saddle portion connected to said backrest so as to extend forwardly and generally horizontally therefrom, said seat also having a generally U-shaped leg-supporting portion, the contour of the interior of the U being generally complementary to said saddle portion and the legs of the U pointing toward said backrest; means pivotally mounting the ends of the legs of the U about an axis fixed with respect to said backrest, such that said seat portion is swingable in a vertical plane relative to said backrest and saddle portion; and power means connected between said base frame and said backrest and saddle portion for raising and lowering said backrest and saddle portion relative to said base frame whereby said leg supporting portion swings between a first position generally coextensive with said saddle portion when said backrest and saddle portion are in a lowered position and a second position inclined downwardly and forwardly with respect to said backrest and saddle portion when said backrest and saddle portion are in a raised position.
Claim 3
Dependent Claim
51 words
A chair as in claim 1 wherein said base frame includes a front bar to which is hinged a pair of upper links and at least one lower link, said links being at their opposite end connected with the lower end of said backrest, said links forming substantially a parallellogram linkage.
Claim 4
Dependent Claim
62 words
A chair as in claim 2 wherein said front bar is secured to the front ends of two substantially horizontal shafts which are slidable in two substantially horizontal bushings, said bushings being connected with said leg supporting portion by means of links which urge said front bar rearwardly when said leg supporting portion swings from its first position towards its second position.
Claim 5
Dependent Claim
123 words
An invalid chair comprising: a floor-engaging base frame assembly; a backrest assembly disposed above said frame assembly, said backrest assembly including a backrest portion and a saddle extending forwardly and generally horizontally from said backrest portion; a generally U-shaped leg-supporting assembly disposed forwardly of said backrest portion and having a front edge and rearwardly extending legs; means including a linkage assembly pivotally interconnecting said leg-supporting assembly and said base frame assembly for allowing said backrest assembly to move between an up position and a down position relative to said base frame assembly and simultaneously for pivoting said leg-supporting assembly between a first position generally coextensive with the straddling said saddle and a second position inclined downwardly and forwardly with respect to said saddle.
Claim 6
Dependent Claim
123 words
An invalid chair comprising: a floor-engaging base frame assembly; a backrest assembly disposed above said frame assembly, said backrest assembly including a backrest portion and a saddle extending forwardly and generally horizontally from said backrest portion; a generally U-shaped leg-supporting assembly disposed forwardly of said backrest portion and having a front edge and rearwardly extending legs; means including a linkage assembly pivotally interconnecting said leg-supporting assembly and said base frame assembly for allowing said backrest assembly to move between an up position and a down position relative to said base frame assembly and simultaneously for pivoting said leg-supporting assembly between a first position generally coextensive with the straddling said saddle and a second position inclined downwardly and forwardly with respect to said saddle.
References Cited (Backward Citations)
US604347A
Cited
US1288216A
Cited
GB608542A
Cited
US2690208A
Cited
US3138402A
Cited
GB998676A
Cited
US4067249A
Cited
US4193147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |