Chair control

Details Chair control Chair control

1993-06-10

1994-12-06

Dorner, Kenneth J.

Chairs and seats

Movable bottom

Tiltable

297302, 297304, A47C 102

Patent

active

053704452

ABSTRACT:
Disclosed is knee tilt chair control mechanism for a pedestal base chair having a chair control housing mounted on the pedestal chair base and pivotally supporting a chair seat support member having a cam surface formed along a portion of the bottom surface thereof. A torsion spring is secured to the chair control housing and is adapted to resist the pivotal movement of the chair seat support member. The torsion spring has a lever arm adapted to move along the cam surface during the pivotal movement of the chair seat support member and thereby make a more effective use of the torsion spring and a chair more comfortable to the user.

REFERENCES:
patent: 3740792 (1973-06-01), Werner
patent: 4195372 (1980-04-01), Farina
patent: 4575150 (1986-03-01), Smith
patent: 4776633 (1988-10-01), Knoblock et al.
patent: 4818019 (1989-04-01), Mrotz, III
patent: 4865384 (1989-09-01), Desanta
patent: 4889385 (1989-12-01), Chadwick et al.
patent: 5029940 (1991-07-01), Golynsky et al.
patent: 5224758 (1993-07-01), Takamatsu et al.
patent: 5238294 (1993-08-01), Ishi et al.

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