Patent ID: 7765895

Claim:
A fluid-operated torque wrench for tightening or loosening a fastener, comprising a housing having two housing portions including a cylinder portion and a driving portion; cylinder-piston means arranged in said cylinder portion and movable along a first axis; a ratchet mechanism arranged in said driving portion and connected to said cylinder-piston means to be driven by the later, said ratchet mechanism having a ratchet turnable about a second axis which is perpendicular to said first axis; at least three connecting means including a first connecting means for receiving a given turning force acting in one direction during operation of the wrench; a second connecting means receiving said given turning force acting in said one direction during operation of the wrench, and a third connecting means receiving a given turning force acting around said first axis in another opposite direction during operation of the wrench and being equal to said given turning force acting in said one direction so that one of said turning forces turns a fastener to be tightened or loosened while another of said turning forces is transferred to a stationary object; at least three force-transmitting elements including a first force-transmitting element attached to said first connecting means for abutting against a first stationary object, a second force-transmitting element attached to said second connecting means for abutting against a second stationary object, and a third force-transmitting element attached to said third connecting means for turning a fastener, said third force-transmitting element being coaxial with said second axis while said first and second force-transmitting elements are located at opposite sides from said third force-transmitting element as considered in a circumferential direction and at opposite sides of said second axis, said first, second and third connecting means being separate from each other, and said first and second force-transmitting elements being configured as separate force-transmitting elements which are directly attachable separately, individually and independently from said third force-transmitting element and from each other to said first and second connecting means correspondingly without connecting said first and second force-transmitting elements to said third force-transmitting element and to each other, to abut separately, individually and independently against the first and second neighboring objects, wherein one of said first and second connecting means is provided on said cylinder portion of said housing while the other of said first and second connecting means is provided on said driving portion of said housing, and said third connecting means is provided on a driving element which is driven by said ratchet mechanism and extends from said driving portion of said housing.