Abstract: An apparatus and method for use in cushioning movement of a member in a press includes a cushion assembly having a piston and cylinder which are movable relative to each other against the influence of fluid pressure to cushion movement of the member. A flexible diaphragm retains a body of lubricant between an inner side of the diaphragm and the piston. The body of lubricant lubricates a seal between the piston and the cylinder. Fluid pressure is applied against the outer side of the diaphragm to oppose movement of the piston during operation of the press from the open condition to the closed condition. The piston is movable relative to the cylinder, under the influence of the fluid pressure applied against the outer side of the diaphragm and transmitted to the piston, during operation of the press from the closed condition to the open condition. The piston and diaphragm are spaced apart with the body of lubricant filling the space between the piston and diaphragm.

Abstract: An improved press cushion includes a piston which is disposed within a cylinder chamber. The head end of the cylinder chamber is arranged for communication with a compressed fluid, such as nitrogen gas. The rod end of the cylinder chamber is arranged for communication with a source of air which is free of contaminants found in the immediate environment of the cylinder assembly. Although clean air could be obtained from the atmosphere at a location spaced from the press, the rod end of the cylinder is advantageously connected to a low pressure supply of clean air.