Abstract: A locking and release mechanism device for use with collapsible telescoping members, such as a tow bar that can be collapsed for ease of storage when not in use, and provide for attachment, locking and detachment regardless of load, e.g. to towed and towing vehicle devices regardless of vehicle static load relative to each other. Exemplary In embodiments of the invention include a locking mechanism using roller release members which are lever actuated, the roller release member according to the present invention cooperate with the telescopic members and related elements such that to release the locking mechanism members, a minimum lever force is required.

Abstract: The invention relates to a release mechanism and device for collapsible telescoping members, such as a tow bar that can be collapsed for ease of storage when not in use. The invention relates to adjustable telescoping frame members for attachment and detachment regardless to load, e.g. to towed and towing vehicle devices regardless of vehicle static position relative to each other. In exemplary embodiments of the invention wherein the locking mechanism uses roller release members which can be lever actuated, the roller release member according to the present invention cooperate with the telescopic members and related elements such that to release the locking mechanism members, a lever is operated.

Abstract: A tow bar assembly includes first and second telescopic members. A releasable locking arrangement holds the first and second telescopic members in an extended position and includes at least one movable member to maintain the telescopic members in the locked relationship and a pivotally mounted release member mounted on one of the telescopic members to move the movable member to permit slidable movement between the first and second telescopic members. The invention provides coupling of interacting members one slidable in the other. The members define an opening for an extended and circular counterpart. The counterpart penetrates the opening and the members are held in position. The members together exert forces on the counterpart and a release device between the counterpart and the members release the members.

Abstract: A coupling for coupling first and second members. The members define an opening for extended and circular counterparts. The counterparts turn on the members and each other while the members contact the counterparts to urge them together. The counterparts, one after another between the members, move and release the members.

Abstract: A latch for a hitch having release mechanism including a pair of parallel oriented cylinders which are disposed to lock together two separable elements of a hitch. The locking cylinders are disposed between the confronting surfaces within portions of the separable hitch elements to receive a compression force across the both of the cylinders when the hitch elements are receiving an tensions so as to separate them. To release the hitch elements while under tension, one of the cylinders is rotated, causing the adjacent, parallel disposed cylinder to rotate in the opposite direction, rolling over the confronting surfaces in the same directions, and eventually out of and releasing the two separable hitch elements. Multiple embodiments are shown which relate to variations in hitch styles, and further embodiments relate to smaller clamping devices, such as hand tools, and to rotational couplers which are releasable while under torque.