Pneumatic support column for a chair

Details Pneumatic support column for a chair Pneumatic support column for a chair

A - Human Necessities

47

C

A47C 3/40 (2006.01) A47C 3/00 (2006.01) A47C 3/20 (2006.01) A47C 3/30 (2006.01) A47C 5/02 (2006.01) A47C 7/00 (2006.01) A47C 7/02 (2006.01)

Patent

CA 2319884

A tiltable chair including a base member (44), a seat (32), a back (34), and a linkage assembly (40) adapted to allow the seat and back to tilt downwardly and rearwardly and to allow pivotal movement of the seat about a pivot axis (52) in substantial alignment with the hip joints of a user. Other aspects of the invention are to provide a vertically adjustable column (42) for supporting the seat of the chair, a support assembly including a frame member (33) having a central opening therethrough and a receptacle formed around the perimeter thereof, a carrier member adapted to fit inside the receptacle, and a membrane of elastic material (210) covering the central opening, and a pair of armrests (36) adapted to be mounted to the chair to allow pivotal movement thereof.

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