Abstract: Improvements in a bench is disclosed. The bench is configured so the gap between the seat and the backrest is adjusted as angle of the back rest is changed. The gap is maintained my sliding or translating the backrest or the seat on the frame as the angle of the back rest is changed. This can be with a rack and pinion, a tension strap, or a mechanical linkage. The mechanism converts the angular change of the backrest to a linear translation or an arc translation to alter the position of the backrest, seat, or a combination thereof to prevent contact between the seat and the back rest and prevents creation of a large gap between the seat and the backrest that can cause discomfort. In some embodiments, the gap is adjusted based upon an angle of a constrained brace that locks the backrest at fixed angles.

Abstract: A sleeve for mounting a prosthetic unit on a limb is formed using a tripartite composite that includes a breathable woven fabric in combination with an elastic urethane middle layer and a soft perforated plastic inner layer. The middle layer can be a hyper-elastic polymer that is cured to a hemispherical shape to stretch and move while maintaining a shape memory that returns the polymer to its original shape once relieved of a stretching force. Moreover, the liner/prosthetic sleeve of the present invention's anatomical suspension works as an advantage to maintain its placement on the user's residual limb.