| 摘要 |
PROBLEM TO BE SOLVED: To inhibit increase of contact stress, decrease drive power, and wear of a vane tip part. SOLUTION: The width D2 of the tip part of the vane 2 in contact with a wall surface of a cylinder chamber 2 is formed wider than the width D1 of a base body part of the vane 2. Consequently, curvature R of the tip part of the vane 2 becomes larger as compared to a case in which the width of the tip part of the vane 2 is same as the width of the base body part. Since the contact area with an inner wall of a cylinder chamber 2 is expanded, friction resistance between the vane 2 and the cylinder chamber 2 is reduced. Consequently, drive power is reduced, the tip part of the vane 2 is controlled limited to materialize a long lifetime. COPYRIGHT: (C)2008,JPO&INPIT
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