The present invention relates to a fluid-operated wrench for tightening and loosening of threaded connectors, such as bolts, nuts and the like.
Fluid-operated wrenches are widely known in the art. A known fluid-operated wrench includes a housing, drive means, and engaging means which is engageable with a threaded connector and turnable by the drive means for turning the threaded connector so as to tighten or loosen the latter. In existing fluid-operated wrenches, the engaging means is turnable by a transmission element arranged between the drive means and the engaging means. The housing itself does not directly support the engaging means. There are many instances in which a threaded connector, for example, a bolt, must not be subjected to usual reaction forces to prevent its bending. This is especially important when the bolt is very long and can break under the action of such reaction forces. The fact that in the known fluid-operated wrenches the engaging means is not directly supported by the housing does not eliminate the above-described problem of applying reaction forces to a long threaded connector, for example a bolt, so as to avoid bending of the latter. Therefore, the object of the invention is to eliminate the disadvantages of the prior art.