| 摘要 |
<p>A multi-cylinder hydraulic device characterized by being constructed such that a unit for converting the stroke of a piston (22) into rotating motion or vice versa comprises: a member (33) having a loop-like groove (35) to encircle the central axial line and formed on a circular column so as to be in the shape of wave having appropriate cycles when developed; and a roller (32) located in a position projecting farther sideward than the piston rod (26) extending from said piston (22) and rotatably fitted in said groove.</p> |
