| 摘要 |
A pressure-feeding apparatus has a construction wherein a flexible membrane member (1) made of rubber or the like is disposed while its base end is fixed, inside a cylindrical housing (8) in such a manner as to swell at its tip portion and to define a pressure-feeding chamber (2) for a liquid to be pressure-fed at the front portion and a pressure chamber (3) for an operation liquid such as oil at the rear portion. Another hydraulic cylinder (16) is directly coupled to the wall of the pressure chamber (3), an output chamber (5) of said another hydraulic cylinder is directly coupled through the feed/discharge ports (7') and the piston (23) of said another hydraulic cylinder (16) is interconnected to a piston (28) of still another hydraulic cylinder (26) disposed at the rear of said another hydraulic cylinder (16) through a rod (24).
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