Patent ID: 7197875
Filing Date: 2007-04-03
Classification: B60T,B62L,F15B

Abstract:
1. A hydraulic cylinder comprising: a housing having a bore of cylindrical cross-section and having an outlet adjacent one end thereof; a piston having a seal mounted thereon and a shaft extending therefrom, the piston being slidably and sealingly inserted into the housing and being movable therein from a position proximate to the outlet to an extended position remote from the outlet, a pressure chamber being formed between the seal mounted on the piston and the one end of the housing; a second seal member slidably mounted on the shaft at a position within the bore of the cylinder, the second seal providing a seal between the shaft and the bore of the housing, and being slidable with respect to the housing, a fluid reservoir being formed within the housing between the seal mounted on the piston and the second seal member, the pressure chamber being in line with one another and being coaxial; a channel providing fluid communication between the pressure chamber and the reservoir when the piston is in its remote position.