| 摘要 |
<p>PURPOSE:To promote the reduction of rolling resistance and oil leakage, by fitting each ball and each piston opposing their diametric internal end surface to each cylinder in its pressure acting side while each ball to each piston so that each ball is able to roll and unable to be detached. CONSTITUTION:Plural rotary units 13, 20 form plural cylinders 14, 23 in a radial position for the rotary axial center. And each cylinder 14, 23 slidably fits plural pistons 16 having a ball 15 respectively. While each rotary unit 13, 20 provides plural annular track units 17, 26, to which each ball 15 is adapted rolling, to be arranged in the outer of the rotary unit. In the above constitution, each piston 16 is fitted to each ball 15 so that each ball 15 is able to roll further unable to be detached. While each of the ball 15 and the piston 16 opposes its diametric internal end surface to each cylinder 14, 23 in its pressure acting side. And each piston is slidably fitted to each cylinder 14, 23.</p> |
