Patent ID: 7451672

Claim:
A link attachment to a torque wrench providing coaxial action and reaction turning forces in opposite directions at equal torque, said link attachment comprising a link housing; means for abutting against a nearby stationary object and including a projecting part provided in the link attachment and abuttable against a nearby stationary object; means for turning a fastener and supported in said link housing and including a ratchet mechanism with a ratchet provided in the link attachment and engageable with a fastener to turn the latter and at least one lever drive plate turning said ratchet; first connecting means provided in the link attachment for connecting said link housing to a part of the torque wrench providing a reaction turning force and second connecting means provided in the link attachment for connecting a part of the torque wrench providing an action turning force for said at least one lever drive plate of the link attachment, so that a turning action of the torque wrench is converted into a linear action applied to said at least lever drive plate of the link attachment so as to turn said at least one lever drive plate and thereby to turn a fastener by said ratchet, while abutting against a nearby stationary object with the projecting part of the link attachment to stop the torque wrench from turning around the fastener to be tightened or loosened so that the link attachment provides simultaneously turning of the fastener and stopping of the torque wrench from turning around the fastener; switching means for switching a turning direction of said ratchet and arranged so that during tightening of the fastener said ratchet of the link attachment turns the fastener in a predetermined direction, and for tightening the nearby object also formed as a fastener, the link attachment is turned over and said ratchet also turns said further fastener in the same direction, while simultaneously a turning direction of said ratchet of the link attachment is changed when going from the tightening of the first mentioned fastener to the tightening of the further fastener, wherein said switching means of the link attachment include a pawl engageable with said ratchet and an actuating element acting on said pawl so that said pawl engages said ratchet in two different modes that provide turning of said ratchet in two opposite directions, wherein said actuating element defines an axis of turning of said pawl, which axis of turning of said pawl is parallel with a turning axis of the fastener, and moves between two positions that determine said two different modes, wherein said actuating element includes a pin which defines the axis of turning of said pawl, and wherein said pawl has a groove and said pin being movable within said groove between the two positions by said actuating element.