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