Chair control for a pedestal chair having a knee-tilt seat

Details Chair control for a pedestal chair having a knee-tilt seat Chair control for a pedestal chair having a knee-tilt seat

A - Human Necessities

47

C

155/42

A47C 7/00 (2006.01) A47C 3/026 (2006.01) A47C 4/00 (2006.01)

Patent

CA 2012639

A CHAIR CONTROL FOR A PEDESTAL CHAIR HAVING A KNEE-TILT SEAT Abstract of the Disclosure A chair control for a pedestal chair having a knee- tilt seat. An elastomeric torsion spring is offset rearwardly from the tilting axis of the seat. The seat and torsion spring are operatively connected by a cam surface and a cam follower which effectively reduce the restoring force exerted by the torsion spring against the seat as the rearward tilt of the seat increases. A mechanism to adjust the initial restoring torque of the torsion spring provides a large angular twist of the torsion spring with a minimum linear movement of the mechanism. The chair control provides the chair seat with a less than conventional seat angle relative to the horizontal when the chair is unoccupied. A mechanism is provided to enable the occupant to adjust the chair seat to a more conventional seat angle in its unoccupied condition.

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