Abstract: The present invention pertains to a wiping and/or sealing element for sealing a piston (11) guided movably in a housing (10) with a seal held in a groove (21, 30). The present invention pertains, furthermore, to a process for sealing a movable piston (11) by means of a seal inserted into a groove (21, 30) and a clamping and/or support element with a piston (21), which is guided in a housing (10) such that it can be withdrawn and extended, wherein the piston (11) is sealed by means of a seal arranged in a groove (21). To achieve sealing of the piston (11) with a high sealing force for high liquid pressures at low friction, the wiping and/or sealing element according to the present invention as well as the clamping and/or support element according to the present invention are wherein the seal is a quad ring (22) with a square cross section.

Abstract: The present invention pertains to a wiping and/or sealing element for sealing a piston (11) guided movably in a housing (10) with a seal held in a groove (21, 30). The present invention pertains, furthermore, to a process for sealing a movable piston (11) by means of a seal inserted into a groove (21, 30) and a clamping and/or support element with a piston (21), which is guided in a housing (10) such that it can be withdrawn and extended, wherein the piston (11) is sealed by means of a seal arranged in a groove (21). To achieve sealing of the piston (11) with a high sealing force for high liquid pressures at low friction, the wiping and/or sealing element according to the present invention as well as the clamping and/or support element according to the present invention are wherein the seal is a quad ring (22) with a square cross section.

Abstract: A hydraulic clamp embedded in a T-slot of a machine tool bolster plate, has a T-slotted piston rod end which fits continuously within the T-slot of the bolster plate. Using a T-configured member secured to the underside of a die shoe, and slid into the T-slot, actuating the hydraulic clamp draws the shoe downward, firmly clamping it against the bolster surface. If, instead of a T-configured member, and I-beam member (in effect, a double T) is used in a die shoe having a T-slotted undersurface, the clamping force is extended over the entire length of the I-beam. The effect is to avoid distortion of the die shoe. In addition to the surface friction attendant to the present distortion-free clamping, positive resistance of sideward displacement of the shoe is provided by the T-slot edges. When the present invention is not employed for clamping, the T-slotted surfaces of the bolster plates are unencumbered and may therefore be used and cleaned in an ordinary manner.