Patent ID: 8336444

Claim:
A hydraulic cylinder comprising: a piston fitted within a cylinder so as to be slidable and a piston rod to one end of which the piston is fixed; a plate disposed on a side of at least one of both end faces of the piston so as to be slid integrally with the piston and brought into contact with and separated from the one end face with a face of the plate being substantially parallel to the one end face, wherein the sliding of the plate is regulated relative to sliding of the piston at a stroke end of the piston; a narrow gap defined between the face of the plate and the end face of the piston opposite to the plate by a regulation of the sliding of the plate, the gap configured to produce a squeeze effect; and a groove for a return stroke of the piston, the groove being defined in the face of the plate that is brought into contact with a cylinder head or a cylinder bottom or in the cylinder head or the cylinder bottom opposite the face of the plate.