Patent ID: 6695105
Filing Date: 2004-02-24
Classification: F16F

Abstract:
A hydraulic shock absorber, comprising:a cylinder having an expandable and contactable piston rod; an outer casing disposed on an outside of the cylinder; a reservoir defined between the outer casing and the cylinder; an elastically deformable and cylindrically-shaped bladder disposed in the reservoir; an annular gas chamber located between an inner surface of the outer casing and an outer surface of the bladder, the gas chamber being filled with sealed gas, an outer peripheral surface of upper and lower ends of the bladder being attached by pressure to an inner peripheral surface of the outer casing; a reservoir chamber formed between the bladder and the cylinder and being in communication with an inside of the cylinder to guide hydraulic fluid; a gas sealing valve provided at the outer casing and being configured to open and close a flow conduit that communicates with the gas chamber; a pair of guide rings which are fitted on and fixed to a periphery of the cylinder with a specific axial spacing, the upper and lower ends of said bladder being respectively interlocked with the guide rings; and a cap fitted over an outside of the lower end of the bladder such that a bottom of the cylinder is enclosed, wherein the flow conduit is a gas flow conduit for communicating the gas chamber with the gas sealing valve, the gas flow conduit being formed between an outer surface of the cap and the inner surface of the outer casing.