| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve efficiency in jack-up work. <P>SOLUTION: A pump piston 24 is operated by a long-sized handle 32 reciprocated on a plane substantially parallel to a base 10 used as an installation face, to supply a cylinder 12 with a hydraulic fluid stored in an oil tank 18; and a piston 14 fittingly inserted in a reciprocating manner into the cylinder 12 is projected to jack up an object. Even when a clearance between the bottom face of the object to be jacked up and the installation face of the hydraulic jack is narrow, the handle 32 can be moved linearly large to improve efficiency in jack-up work. <P>COPYRIGHT: (C)2012,JPO&INPIT |
