GAS SPRING AND METHOD OF MANUFACTURE

摘要

A gas spring construction in which a cartridge (18, 20) is fit into each end of a straight sided tube 14 and secured therein with a retaining ring (22) snap fit into an internal groove (24) at each end of said tube. One cartridge (20) has a bore through which a piston rod (36) presses while the other cartridge (18) has a charging valve (34) installed therein. A precharged auxiliary chamber is provided in the piston rod (36) for bore sealed gas springs communicating with the space behind the piston to alleviate the vacuum developing as the piston (36) is stroked to preclude drawing in contaminants. The gas pressure can be set to a level to create a desired spring rate of the gas spring (10).