CUSHION ASSEMBLY AND METHOD

摘要

A cushion assembly (10) includes a Iower end wall (14) which is at Ieast partially enclosed by a tubular cylindrical outer wall (12). An upper end wall (16) is also partially enclosed by the outer wall (12). A tubular cylindrical inner wall (18) extends between recesses (60, 120) in the Iower end wall (14) and the upper end wall (12). A piston (20) is disposed within the inner wall (18) and is movable along the inner wall (18) toward the upper end wall (16) under the influence of gas pressure. The piston (20) is movable along the inner wall (18) toward the Iower end wall (14) of the influence of force applied against the piston (20) during operation of a press. A passage (52) is formed between an end portion of the inner wall (18) and the Iower end wall (14) to conduct a flow of lubrication Iiquid (32) and gas to lubricate the piston (20).