Chair
First Claim
1. A chair comprising a seat, a backrest, and a fixed support for the seat and the backrest, where the seat and the backrest are each pivotally mounted for independent pivotal motion and the seat and the backrest are both biased to provide posture-responsive support of an occupant.
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Accused Products
Abstract
A chair has a seat (4) and a backrest (5) which are independently pivotable within limits at extremities. The seat is biassed upwardly at the front and the backrest is biassed forwardly. The seat and the backrest have a common pivot joint (8), under the center of gravity of the occupant. There are no occupant-operated controls as the chair responds automatically to the posture of the occupant, providing full support at all relative positions of the seat and the backrest in a balanced manner for occupants of a wide range of weights.
2 Citations
31 Claims
- 1. A chair comprising a seat, a backrest, and a fixed support for the seat and the backrest, where the seat and the backrest are each pivotally mounted for independent pivotal motion and the seat and the backrest are both biased to provide posture-responsive support of an occupant.
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14. A chair comprising:
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a seat which is pivotally mounted for rotation about a pivot axis;
a backrest which is pivotally mounted for rotation about a pivot axis, wherein said pivot axis is substantially coincident with that of the seat, and wherein said axis are located with respect to the seat to be located substantially under the centre of gravity of an occupant of the chair;
a fixed support supporting the seat and the backrest and comprising;
stop means to limit downward pivoting of the seat, stop means to limit forward pivoting of the backrest, and stop means to limit rearward pivoting of the backrest;
a seat bias means urging upward pivotal movement of the seat at its front about its pivot axis; and
a backrest bias means urging forward pivotal movement of the backrest about its pivot axis.
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20. A chair mechanism comprising:
a fixed support, a seat support comprising means for supporting a seat pad, and a backrest support comprising means for supporting a backrest pad, wherein the seat support and the backrest support are each pivotally mounted for independent pivotal motion, and the seat support and the backrest support are both biased to provide posture-responsive support of an occupant of a chair incorporating the mechanism. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
Specification