| 摘要 |
<p>A triangular articulated lever system (10) is supported on a vertical support tube (12). The system (10) includes a pair of swing arms (14, 16) that are pivotally mounted on the support tube (12) for supporting a lifting bar (56). A threaded extension (306) of a gas cylinder spring arm (30) is coupled to an articulated mount (53) at an apex of the triangular lever system formed by the swing arms (14, 16) and the spring arm (30). The cylinder (30) is coupled by a clevis arrangement (38) to a lead screw (32) for changing the configuration of the articulated triangular lever system (10) and adjusting the load at the lifting bar (56). A bench is positioned beneath the lifting bar (56) and is pivotally mounted to a base (26) for rotation out from underneath the lifting bar (56) for non-bench exercises. The lifting bar (56) is mounted for limited universal movement at the end of the swing arms (14, 16) and is rotatable about its longitudinal axis. The preferred embodiment has a cylindrical serpentine-shaped tube configuration (100).</p> |
