Chairs and seats – Rest for knee – leg – or foot – Connected to chair or seat for relative movement
Patent
1999-02-10
1999-11-23
Barfield, Anthony D.
Chairs and seats
Rest for knee, leg, or foot
Connected to chair or seat for relative movement
29734419, 29742319, 248161, A47C 750
Patent
active
059887540
ABSTRACT:
A chair includes a base having a hub, radially extending legs connected to and supporting the hub, a vertically extendable gas spring rotatably supported on the hub, and a hub tube sleeve non-rotatably fixed to the hub. A seat includes a housing that engages and is supported on the gas spring for vertical height adjustment, and a sleeve retainer rotatably connected to the control housing and extending downwardly therefrom. The sleeve retainer non-rotatably but slidingly engages the hub tube sleeve. A footrest is supported by the sleeve retainer. The footrest is non-rotatably and slidably connected to the base via the sleeve retainer and the hub tube sleeve, so that the footrest moves vertically with the seat when the seat is vertically adjusted, but does not rotate with the seat when the seat is rotated. The footrest is adjustably supported on the sleeve retainer, so that it can be manually adjusted to change the distance from the footrest to the seat.
REFERENCES:
patent: 2308358 (1943-01-01), Cramer
patent: 2659413 (1953-11-01), Cramer
patent: 3278229 (1966-10-01), Bates
patent: 3642320 (1972-02-01), Ward
patent: 4148524 (1979-04-01), Guyton
patent: 4348051 (1982-09-01), Boucher
patent: 4408801 (1983-10-01), Edel et al.
patent: 4960305 (1990-10-01), Opsvik
patent: 5011227 (1991-04-01), van Hekken et al.
Hasbany John Hanna J.
Lamart Michel A.
McCaul Mark A.
Van Luyn William M.
Barfield Anthony D.
Steelcase Development Inc.
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