| 摘要 |
The jack comprises a frame (1), a cylinder (13), a piston (17) displaceable by means of an hydraulic fluid, and a pump which can be actuated alternatively by a pedal (55) or a manually pivoting operating lever (57). In addition a discharge valve (35) is provided, the shut off device (39) of which is displaceable by means of a control member (75) held by the operating lever (57), via a cam drive comprising a transmission member (59) which can be pivoted about the same pivot axis as the pedal (55). The operating lever (57), and a slider (105) which can be displaced across a curved guiding surface of said transmission member. The cam drive is economical to manufacture and to assemble and is operationally reliable. |
