| 摘要 |
Single-action jack, consisting of a support 60 fitted with a hub 68 pivoting in bearings, carrying a control shaft 61, of a curved cylinder 62 fixed to the said support 60 coaxially with the said shaft 61; and closed at one end by a directional control valve 63 for a pressure fluid; of a curved piston rod 65 interacting with the said cylinder 62, having the same radius of curvature and also coaxial with the shaft 61, the said rod being fixed by one of its ends to a lever 64 fixed to the said shaft 62 and fitted, at its other end, with a sealing cup 66. <IMAGE>
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