Patent ID: 7080592

Claim:
A rotating high-speed, 7000 revolutions per minute, pneumatic clamping cylinder comprising: a distributor of cylindrical shape made from a light weight metal; a clamping piston shaft made from steel, rotating within said distributor; bearings operating between third and fifth diameters of said shaft and mating diameters on the internal diameter of said distributor; an anti-seizure bearing insert made from a wear resistant material such as a press fit into a machined race in the internal diameter of said distributor; elastomeric shaft seals are filled into an end cap, and wipe against the small diameter of shaft 28 ; and pluralities of ports for fluid supply are bored though the walls of said distributor and outer wall of said anti-seizure insert into concentric channels machined into the inside diameter of said anti-seizure bearing insert and axial bores are made parallel to the axis of said shaft with cross bores at the levels of said concentric channels connecting said axial shaft bores to said circumferential insert channels allowing for the exit of said fluid supply, whereby wear related seizures are virtually eliminated and the clamping system can be arranged in any attitude allowing the doubling of industry standard warranties.