| 摘要 |
PROBLEM TO BE SOLVED: To take a measure for increasing an operating pressure in a tip part of a piston. SOLUTION: The tip part of the piston 4 is constituted by a slope 4a having the same angle as an inclination angle of a thrust plate 3 which is a swash plate to use the tip slope piston 4 coming into contact with the thrust plate 3 by the whole slope 4a. Consequently, a pressure of the slope 4a can be suppressed to a low pressure to increase an operating pressure.
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