| 摘要 |
PURPOSE:To reduce the number of parts and size by engaging an accumulator piston with a easing so as to slide freely, and providing a differential pressure regulating valve at the accumulator piston through a pressure accumulator and a circular space. CONSTITUTION:The respiration of an output fluid pressure chamber 20 in respective fluid pressure transmission units 4FL... can be carried out by a sealing member 28 which is installed at the outer periphery of a free piston 21, and the respiration of a passage 24 which leads to the valve chamber 33 of respective by-path valves 23 can be carried out by cup seals 137, 138 installed at the outer periphery of an accumulator piston 116 in a stroke accumulator 113. A one-way valve for generating respiration is organically-integrated with the free piston 21 and the accumulator piston 116 respectively, thus it is possible to embody size reduction. |
