Abstract: A blind assembly for camouflaging a hunter and setup configurations for the blind assembly are disclosed. The blind assembly contains two sheets wound together into a roll that are configured for separate outstretching at an angle relative to each other, for being maintained under tension in an outstretched form, and for retraction back into the roll. The end of each sheet contains a handle rod used for handling the sheets and for anchoring to the ground by means of attaching to stakes inserted into the ground using ropes. The roll end of the assembly structure is likewise attached to a stake in the course of setting up the blind assembly in a hunting field.

Abstract: Embodiments for barrier assemblies and setup configuration of these barrier assemblies are disclosed. The barriers are used to block the entry of children or animal into areas in which their safety may be jeopardized. The barrier assemblies contain a sheet configured for outstretching and for retraction into a roll form, and for being maintained under tension in an outstretched form. A locking assembly prevents the sheet from accidentally retracting. The barrier assemblies are configured for indoor use by means of attaching to walls and stair posts as well as for outdoor use by anchoring the barrier assembly to the ground.

Abstract: A spiked athletic shoe includes a shoe upper and an outsole housing connected to the shoe upper. The outsole housing includes a bottom having a plurality of spike openings. Spaced-apart rear and front spike plates are positioned within the outsole housing and include a plurality of spikes attached for movement between a spike-extended position through the spike openings and a spike-retracted position. Springs engage the rear and front spike plates for normally urging the rear and front spike plates and attached spikes upwardly into the spike-retracted position. A mechanically-actuated slide overlies the rear and front spike plates for controlling movement of the spike plates between the spike-retracted position and the spike-extended position.

Abstract: A barrier extendable and retractable beneficially in response to a changing environment of use, is disclosed. In use, the barrier is attached at its ends to support surfaces. An extension and retraction mechanism for the barrier beneficially exerts substantially constant force regardless of the barrier extent. In a preferred embodiment, a ball screw, an axially movable ball screw nut, and gas springs are used.