Patent Number: 6,309,328

Title: Exercise device

Abstract: An exercise device comprises a housing with a self-rewinding spool of cord. The cord is threaded out between a pair of inner wedgeblocks that can move together and pinch the cord. The amount of pinch applied determines how much resistance will be applied when the user exercises by pulling out the cord on handles. The inner wedgeblocks are disposed between a pair of outer fixed wedgeblocks. Facing channels in the interfaces between the inner and outer wedgeblocks have ball bearings that run on inclined ramps. When the inner wedgeblocks are pulled by the cord out of alignment with the outer wedgeblocks, the inclined ramps and ball bearings press the inner wedgeblocks together. The more they press together, the more the cord resists being pulled out. An adjustment limits how far the inner wedgeblocks can move out of alignment.

Inventors: Dudley; David Edmond (San Jose, CA)


International Classification: A63B 21/16 (20060101); A63B 21/00 (20060101); A63B 21/018 (20060101); A63B 21/012 (20060101); A63B 23/035 (20060101); A63B 23/12 (20060101); A63B 021/012 (); A63B 021/018 ()

Expiration Date: 10/30/2018