US4545616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile chair with elevating seat
Assignee: National Research Development Corp UK
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Filing: 1984-02-22
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Granted: 1985-10-08
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Expires: 2004-02-22
Abstract
Abstract An invalid carriage including a chair of pivotted construction with a connection between the back of the chair and a mast that is fixed to a chassis. There are means to raise the connection up the mast, so raising the chair seat from horizontal to forwardly-sloping so as to help raise a user of the chair from a sitting to a standing position, and to lower the connection so that the reverse occurs so as to help a standing person to sit down in the chair. As the mast connection moves, so collapsing or expanding the chair framework, wheels allow the feet of the front legs of the chair to move backwards and forwards over the chassis. In an alternative construction the feet of the front legs are anchored to the chassis, and the foot of the mast rolls backwards and forwards over the chassis as the mast connection moves.
Inventors
- 👤 Eric Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:06
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/1056; A61G5/1059; A61G5/14; A61G2200/00; A61G2200/30; A61G2200/36; A61G5/04; A61G5/041; A61G5/042; Y; Y10; Y10S; Y10S297/00; Y10S297/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
An invalid carriage comprising: a chassis; a chair of pivotted framework construction including a seat and front legs, said front legs receiving support from said chassis; a mast fixed to said chassis; a connection between the rear of said seat and said mast, and means to raise and lower said connection up and down said mast, whereby when so raising said connection to tilt said seat into a forwardly-sloping orientation and so assist a user to rise from said seat into a near-standing position, and when so lowering said connection again to return said seat from a forwardly-sloping orientation to horizontal and so facilitate the change in position of an intending user of said chair from standing to sitting; and in which the means of said support of said front legs on said chassis are movable, whereby when said connection rises up said mast said movable support means move backwards over said chassis towards said mast.
Claim 2
Dependent Claim
156 words
An invalid carriage comprising: a chassis; a chair of pivotted framework construction including a seat and front legs, said front legs receiving support from said chassis; a mast fixed to said chassis; a connection between the rear of said seat and said mast, and means to raise and lower said connection up and down said mast, whereby when so raising said connection to tilt said seat into a forwardly-sloping orientation and so assist a user to rise from said seat into a near-standing position, and when so lowering said connection again to return said seat from a forwardly-sloping orientation to horizontal and so facilitate the change in position of an intending user of said chair from standing to sitting; and in which the means of said support of said front legs on said chassis are movable, whereby when said connection rises up said mast said movable support means move backwards over said chassis towards said mast.
Claim 3
Dependent Claim
137 words
An invalid carriage comprising: a chassis; a chair of pivotted framework construction including a seat, and front legs fixed to said chassis; a mast movably supported upon said chassis; a connection between the rear of said seat and said mast, and means to raise and lower said connection up and down said mast, whereby when so raising said connection to tilt said seat into a forwardly-sloping orientation and so assist a user to rise from said seat into a near-standing position, and when so lowering said connection again to return said seat from a forwardly-sloping orientation to horizontal and so facilitate the change in position of an intending user of said chair from standing to sitting, and whereby when said connection rises said mast moves bodily forwards over said chassis towards said front legs of said chair.
Claim 4
Dependent Claim
137 words
An invalid carriage comprising: a chassis; a chair of pivotted framework construction including a seat, and front legs fixed to said chassis; a mast movably supported upon said chassis; a connection between the rear of said seat and said mast, and means to raise and lower said connection up and down said mast, whereby when so raising said connection to tilt said seat into a forwardly-sloping orientation and so assist a user to rise from said seat into a near-standing position, and when so lowering said connection again to return said seat from a forwardly-sloping orientation to horizontal and so facilitate the change in position of an intending user of said chair from standing to sitting, and whereby when said connection rises said mast moves bodily forwards over said chassis towards said front legs of said chair.
Claim 5
Dependent Claim
119 words
An invalid carriage comprising: a chassis; a chair of pivotted framework construction including a seat, and front legs resting upon the chassis; a mast supported upon the chassis; a connection between the rear of said seat and said mast, and means contained within said mast to raise and lower said connection up and down said mast, whereby when so raising said connection to tilt said seat into a forwardly-sloping orientation and so assist a user to rise from said seat into a near-standing position, and when so lowering said connection again to return said seat from a forwardly-sloping orientation to horizontal and so facilitate the change in position of an intending user of said chair from standing to sitting.
Claim 6
Dependent Claim
119 words
An invalid carriage comprising: a chassis; a chair of pivotted framework construction including a seat, and front legs resting upon the chassis; a mast supported upon the chassis; a connection between the rear of said seat and said mast, and means contained within said mast to raise and lower said connection up and down said mast, whereby when so raising said connection to tilt said seat into a forwardly-sloping orientation and so assist a user to rise from said seat into a near-standing position, and when so lowering said connection again to return said seat from a forwardly-sloping orientation to horizontal and so facilitate the change in position of an intending user of said chair from standing to sitting.
Claim 7
Dependent Claim
26 words
An invalid carriage according to claim 1 in which a footrest is fixed to said front legs so as to move with them over said chassis.
References Cited (Backward Citations)
US3640566A
Cited
CA977271A
Cited
GB1424462A
Cited
GB1435559A
Cited
GB1578742A
Cited
US4031576A
Cited
DE2625046A1
Cited
GB2014844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |