Seat height adjustment mechanism for a chair

Details Seat height adjustment mechanism for a chair Seat height adjustment mechanism for a chair

A - Human Necessities

47

C

A47C 4/00 (2006.01)

Patent

CA 2152726

A chair comprises: (a) a seat portion; (b) a support leg, said leg including a fluid pressure cylinder connected to said seat portion, said cylinder having vertically extending telescopic upper and lower sections and a valve release member, said valve release member movable between a closed position in which said upper and lower sections are fixed in position relative to each other and an open position in which said upper and lower sections are moveable relative to each other; (c) an actuator operatively connected to said valve release member and movable between a first position, in which said valve release member is in said closed position, and a second position, in which said valve release member is in said open position, said actuator having an arm member pivotally mounted on a pivot member with respect to said valve; (d) an actuating button positioned proximate said seat portion and movable between a first position and a second position; and, (e) a flexible cable having a first end connected to said button and a second end operatively connected to said arm member, the ratio of the distance between said pivot member and the portion of said arm member to which said cable is affixed to the distance between said pivot member and said valve release member being sufficient to permit said button to be moved from said first position to said second position by the force applied through a finger of the user when said user is seated in the chair whereby, when said button is moved from said first position to said second position, said valve release member is moved to said open position so that the height of the chair may be adjusted and when said button is moved from said second position to said first position, said valve release member is moved to said closed position so that the height of the chair is then fixed.

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