| 摘要 |
A counterbalance apparatus (10) for moving the work surface (100B) of a work station (100) including outer and inner members (12 and 20) having outer and inner inserts (16 and 26) with outer and inner cam surfaces (16B and 26B). A dampener (30) having a threaded rod (36) is mounted within the inner member. A cam follower (50) is mounted on the dampener such that the rollers (54) are in contact with the outer and inner cam surfaces. Springs (69, 70 and 71) are mounted between the cam follower and an adjustment nut (42) around the dampener. As the work surface moves, the inner member moves in and out of the outer member to compress and expand the springs. The cam rollers move along the cam surfaces and allow for a constant force on the work surface throughout the movement of the work station.
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