Hydraulic cylinder with coaxial, in-line reservoir
OwnerPhilip Henifininventor
Life of this patent
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Abstract
A compact hydraulic cylinder may include a pressure chamber and a reservoir in coaxial, in-line arrangement relative to one another. The pressure chamber and reservoir are separated from one another in use by a piston and hydraulic seal. The piston may be withdrawn to a position in which the pressure chamber and reservoir are in fluid communication through a channel formed in the wall of the cylinder, which may be used for bleeding the pressure chamber. The piston may include a actuator shaft that extends through the reservoir. A follower adjacent the distal end of the shaft seals the reservoir from the exterior of the cylinder.
Claims9
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 and 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, 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.
Dependencies are inferred from the claim text.