Patent ID: 6361110
Filing Date: 2002-03-26
Classification: A47C

Abstract:
In a chair having a height-adjustable base and a seat assembly supported on said base, said height-adjustable base including a pneumatic cylinder for raising and lowering said seat assembly, an axially-movable valve for controlling said pneumatic cylinder, and an actuator for said valve, comprising the improvement wherein said actuator includes a housing which encloses an end of said valve and defines a chamber therein, said housing including a housing opening therethrough to permit access to said chamber, said actuator further including an actuator pin it having a disc-like head disposed in said chamber and a shaft projecting axially from said head through said housing opening, a lower surface of said head being in contacting relation with said axially-movable valve and an upper surface of said head being in contact with an interior surface of said housing, said actuator further including a pin control mechanism for moving said shaft in a direction transverse to said axial direction to effect tilting of said head such that one side of said head contacts said interior surface and defines a pivot axis for tilting of said head while an opposite side of said head contacts said valve to effect axial displacement of said valve.