Patent ID: 8444537

Claim:
A cable and pulley weightlifting apparatus for preventing injury to a weightlifter comprising: a framework including a pair of laterally spaced base sections, a spaced vertical upright comprising a vertical tubular post extending vertically upwardly from each said base section, said vertical tubular post having a plurality of vertically aligned apertures extending therethrough at regular intervals, said vertical tubular post having an attached upper support bracket, an upper transverse member mounted to and extending between the upper ends of said vertical tubular posts, and a lower transverse member mounted to and extending between the laterally spaced said base sections; a first and second said upper support bracket attached to the upper end of each said vertical tubular post; a first and second pulley system, one said pulley system being contained within each said upper support bracket; a first and second counterweight, one said counterweight being slidably inserted within each said vertical tubular post; a first and second dumbbell cable harness; a first and second dumbbell bar; a first and second cable, said first cable having a first end connected to said first counter weight and said first counter weight being inserted into the open end of said first vertical tubular post and having a second end inserted into said first upper support bracket and then connected to the upper end of said first dumbbell cable harness and the lower ends of said first dumbbell cable harness connected to said first dumbbell bar, said second cable having a first end connected to said second counter weight and said second counter weight being inserted into the open end of said second vertical tubular post and having a second end inserted into said second upper support bracket and then connected to upper end of said second dumbbell cable harness and the lower ends of said second dumbbell cable harness connected to said second dumbbell bar; a pair of safety detent pins, one said safety detent pin being removably insertable into said vertically aligned apertures of each said vertical tubular post, said safety detent pin extending through said vertical tubular posts and defining the upper limit of travel of said counter weight within said vertical tubular posts; whereby said safety detent pins are inserted into said vertically aligned aperture of said vertical tubular posts at a predetermined height selected to perform an exercise such that said safety detent pins will limit the upward travel of said counter weight to prevent the downward travel of said first and said second dumbbell bars below the height selected for the start of an exercise.