Abstract: Disposable, water resistant covers having a pair of resilient bands at each open end, and an absorbent medium disposed between the pair of resilient bands. The bands provide a substantially watertight seal between the cover and the users skin surface. The absorbent medium prevents any moisture that manages to bypass one band to reach the other band. The covers are formed to cover any medical application such as bandages, casts, splints, etc., on a patient's head, neck, chest, waist, arms, legs, and feet to protect against water seepage when attending to regular personal hygiene.

Abstract: A zero-deflection support chuck is provided for gripping a load shaft which includes a stable support body having a bore, a gripping sleeve closely embracing the load shaft and a pressure sleeve within the bore and surrounding the gripping sleeve. The outer surface of the pressure sleeve is exposed to a pressure medium from a pressure source. The outer surface of the pressure sleeve has sealing lands at each end cooperating with the ends of the bore and a spiral groove and lands extending between the sealing lands. The lands between the grooves have the same diameter as the bore in the body. Pressure in the spiral grooves and the inner surface of the body bore moves the gripping sleeve tightly against the support shaft along the entire length of the sleeves and locks the shaft in a stable position.