| 摘要 |
PURPOSE:To enable a piston of acting with a long displacement stroke under remote control by providing a nozzle which is of a movable type and placing a piston displacement shortening mechanism which mechanically shortens the displacement of the piston, between the nozzle the piston. CONSTITUTION:A cam rod 25 integrally projects from the right end face of a piston 22, a movable nozzle 23 is set slidably in the normal direction with respect to the sliding direction of the piston 22, and a roller 26 which is attached to the movable nozzle 23 is brought into contact with the cam face 25a of a cam rod 25. And a flapper 24 is set opposedly to the nozzle part 23a of the movable nozzle 23. Then, the piston 22 is moved by displacing the flapper 24, but the displacement is mechanically shortened by the cam rod 25 on account of which the piston can be displaced with a long stroke by use of a small input displacement under the remote control.
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