| 主权项 |
1. A weight system including:
a support frame; an upper weight stack located within the frame for movement in a vertical direction, said upper weight stack including at least one weight plate, said at least one weight plate having an axially extending selector pin aperture and a central rod aperture; an lower weight stack located within the frame for movement in a vertical direction, said lower weight stack including at least one weight plate, said at least one weight plate having an axially extending selector pin aperture and a central rod aperture; a vertical lift rod, said vertical lift rod being positioned through said central rod apertures; at least one bearing block, said at least one bearing block having a bearing aperture; and at least one linear bearing positioned around said vertical lift rod and housed said bearing block aperture. |
