Abstract: The assembly includes a cleat holder having a base, an outer wall opposite the base, and a cleat-receiving pocket having an opening in the outer wall. A cleat has one end mounted within the cleat holder and an opposite free end tip. The cleat is movable within the pocket between a gripping position in which the free end tip of the cleat projects through the opening of the pocket beyond the outer wall of the cleat holder and a retracted position in which the free end tip of the cleat at least partially retracts into the pocket. A spring is mounted in the pocket for resiliently urging the cleat from the retracted position toward the gripping position. The cleat assembly can include a plurality of separately manufactured, identical cleat holders secured in end-to-end alignment forming an endless belt, chain or the like.

Abstract: A stair-climbing wheelchair has a pair of track assemblies that can be placed in an operative drive mode to propel the wheelchair along ascending and descending paths of travel relative to an obstacle such as a stairway, curb, or the like. Each track assembly includes a guide member with rollers at opposite ends thereof carrying an endless cleated belt. The guide member is arched between its end sections thereby permitting the endless belt to deflect upwardly between the rollers when the endless belt engages an obstacle such as a step, curb or the like. This permits a smooth gradual transition of the wheelchair onto and/or off the top step of a staircase. Preferably, each track assembly also includes an inclined tail section having a separate endless cleated belt. The track assemblies can also be utilized in connection with remote control and/or unmanned motorized vehicles.

Abstract: A stair-climbing wheelchair has a pair of track assemblies that can be placed in an operative drive mode to propel the wheelchair along ascending and descending paths of travel relative to an obstacle such as a stairway, curb, or the like. Each track assembly includes a guide member with rollers at opposite ends thereof carrying an endless cleated belt. The guide member is arched between its end sections thereby permitting the endless belt to deflect upwardly between the rollers when the endless belt engages an obstacle such as a step, curb or the like. This permits a smooth gradual transition of the wheelchair onto and/or off the top step of a staircase. Preferably, each track assembly also includes an inclined tail section having a separate endless cleated belt. The track assemblies can also be utilized in connection with remote control and/or unmanned motorized vehicles.

Abstract: An adult walker having a suspended seat assembly which may be adjusted to accommodate the user. Included is an adjustable support frame which may be raised and lowered with respect to the walking surface. This walker is accessed from the rear, making it safer and easier to enter and exit. Also included is a ramp for ease of access by a wheelchair user.

Abstract: A stair-climbing attachment for a conventional foldable wheelchair including clutch mechanisms connecting the main wheels of the wheelchair to a drive mechanism for manually driving stair-climbing treads, ratchet and pawl mechanisms to selectively prevent or permit descending movement of the wheelchair on stairs, and manually actuated levers to manually position the treads in an operable and inoperable condition, the attachment permitting the wheelchair to be folded and conveniently transported by the user without outside assistance. A second embodiment incorporates a reversible motor to drive the treads. A third embodiment uses a hydraulic mechanism to position the treads.