Tilt mechanism, particularly for knee-tilt chair

Details Tilt mechanism, particularly for knee-tilt chair Tilt mechanism, particularly for knee-tilt chair

A - Human Necessities

47

C

155/22

A47C 3/026 (2006.01)

Patent

CA 1284292

TILT MECHANISM, PARTICULARLY FOR KNEE-TILT CHAIR ABSTRACT OF THE DISCLOSURE The seat and pedestal of a chair are joined by a knee-tilt mechanism which includes a first support fixed to the underside of the seat adjacent the front edge thereof, and a second support fixed to the pedestal and having a sidewardly extending support tube arrangement. The first support has bearing hubs rotatably engaged with the support tube to define a horizontal tilt axis. A restoring mechanism is disposed within the second support for exerting a restoring torque about the tilt axis for urging the seat toward its horizontal position. The restoring mechanism, in the preferred embodiment, employs a sleevelike spring member of an elastomeric material disposed on the tilt axis for developing a restoring torque which generally linearly increases as the seat tilts away from the horizontal position. A second spring coacts between the supports for generating a second restoring torque which is additive with the first torque to effectively cause a torque dwell to facilitate tilting beyond an intermediate position.

558416

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