Patent ID: 7309063
Filing Date: 2007-12-18
Classification: F16F

Abstract:
1. A gas-filled spring for a vehicle, said gas-filled spring operating, wherein said gas-filled spring comprises: a cylinder; and at least one piston that operates therein and divides an internal space of the cylinder into a compression chamber and an expansion chamber; a self-pumping and self-balancing arrangement designed to ensure maintenance of necessary quantities of gas as well as gas pressure settings or differential pressures in the compression chamber and the expansion chamber in order to provide optimal spring function despite any gas leakage occurring and despite temperature variations occurring inside and outside the gas-filled spring, wherein the arrangement comprises: wherein, in said predetermined position, gas can be discharged via a pressure-relief valve assembly, should gas pressure have risen in one or both of the compression chamber and the expansion chamber due to an increase in temperature.