Torque tool

Abstract

A combined torque wrench and geared wrench which includes a ratchet mechanism, so that it can be operated in either a clockwise or a counter-clockwise output direction and so that a nut can be run down by ratcheting if necessary (due to space limitation) or desireable. The body of the wrench is relatively small so it can be operated by hand for quick run down. Provision is made for incorporation of an elongated handle which can be used for quick run down, pre-torquing, and/or a reaction bar. The wrench also incorporates a gear train for torque multiplication, and the gear train can be crank actuated by either of two inputs which are accessible at opposite sides of the body of the wrench, thus making the wrench accessible for crank input even though one side may be in quarters which are too close for use of the crank. The two inputs on opposite sides of the wrench also serves the purpose of allowing drive input on the side opposed to the side which must be supported against a reaction surface. The wrench of the present invention also incorporates an accurate torque readout mechanism so that the load can be accurately determined at all times. The torque readout mechanism may be either a hydraulically operated bellows and gage, or a mechanical readout system, or a strain gage or an electrical or electro-optical or other readout system.