| 摘要 |
A hydraulically operated wrench for simultaneously tightening or loosening two threaded connectors comprises a drive unit including a cylinder and a piston reciprocatable therein and having a piston rod and a pair of transversely spaced side plates preferably releasably connected to the cylinder and projecting to one side of the latter. A plurality of differently constructed drive levers are provided to be selectively pivotally and releasably connected intermediate its ends to the side plates for pivoting about a first pivot axis and having each at one end a polygonal opening for engaging the polygonal member of a first threaded connector to be turned, whereas the opposite end of the respective drive lever is engaged by the piston rod to be tiltable about the first pivot axis at least during the forward stroke of the piston. A plurality of differently constructed drive links are further provided to be selectively and releasably connected at one end to the side plates for pivoting about a second pivot axis spaced from and parallel to the first pivot axis and each having at an opposite end a polygonal opening for engaging the polygonal member of a second threaded connector to be turned.
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