HYDRAULIC DAMPER

摘要

PROBLEM TO BE SOLVED: To provide a hydraulic damper capable of preventing an increase in a pedal load and an increase in clutch return time. SOLUTION: This hydraulic damper consists of a hydraulic force source and a cylinder 11 which is provided in a fluid flow passage between a member using an oil pressure and it and is provided with a bore 19. A piston 12 is received by the bore and is provided with a seal means 30, and a first chamber 13 is fixed on one side of the seal means and a second chamber 14 is fixed on the other side thereof. The cylinder is provided with a sealing belt 20 in a first operation condition of the damper. The piston moves in the bore due to operation oil pressure in the first chamber so that hydraulic fluid can flow from the first chamber into the second chamber to reduce a volume of the second chamber. Moreover, the piston moves in the bore by corresponding to a height of operation oil pressure in the second chamber so that hydraulic fluid can flow from the second chamber into the first chamber to reduce a volume of the first chamber.