| 摘要 |
PURPOSE:To prevent a leak of working fluid and a discharge of pressurized gas, by setting a one-way valve to the opening end of a communication hole, provided in a guide member slidably guiding a piston rod, to the side of a reservoir chamber. CONSTITUTION:A one-way valve 14 is set so as to isolate the opening end 18a of a communication hole 18, communicating a seal chamber 12 provided in a guide member 6 to a reservoir chamber 3, in the side of the reservoir chamber 3 from the reservoir chamber 3. A lip part 19a of the one-way valve 14 is arranged not to be bitten between the guide member 6 and a retainer 11 when the retainer 11 is assembled, never causing a troubled condition such as a discharge of pressurized gas to the outside air arising from an air gap formed between an outer cylinder 4 and a peripheral seal part, due to an inflow of pressurized gas into the seal chamber 12 and/or a warp of the peripheral seal part of the one-way valve 14. |
