Patent ID: 7497147
Filing Date: 2009-03-03
Classification: B25B

Abstract:
1. A torque tool for tightening or loosening connections, comprising a driving element engageable with a turnable part of the connection for turning the turnable part of the connection for tightening or loosening the connection and turnable around an axis; a power drive configured for acting on said driving element such that said drive acts on said driving element to turn said driving element and thereby to turn the turnable part of the connection over a partial stroke and a space is formed between said drive and said driving element, and said drive is then displaced over said space toward said driving element to act again on said driving element to turn said driving element and thereby to further turn the turnable part of the connection over a further partial stroke; and a reaction element engageable with a non-turnable part of the connection and configured such that when said driving element is turned by said drive and turns the turnable part of the connection by an action force, said reaction element counteracts a reaction force generated during turning of the turnable part of the connection, wherein said stationary part and said reaction element are configured so that during turning of the turnable part of the connection by said driving element said stationary part and said reaction element are non-turnable relative to one another, while during the displacement of said drive toward said driving element over said space said stationary part is movable relative to said reaction element with a ratcheting action.