US Patent 7601100 Door mounted chin-up assembly

The equipment is considered in paired aspect, one construction for each of the exerciser's hands. In one arrangement, a strapping loop for each is respectively run through both of two tunneled components—a handhold and tethering anchor. To use it, the anchor is positioned on the opposing side at the top of a closed door so as to become trapped in place against the door and its frame. The exerciser grabs the handhold and performs chin-ups or other body suspension exercises by pulling upward along the door's face. A hand bracing assembly is optionally included to cushion the hands from excessive pressure against the door. If desired, the operator may also temporarily adapt the assembly to pull-type exercises.