Patent ID: 8024996
Filing Date: 2011-09-27
Classification: B25B

Abstract:
1. A power wrench comprising: a drive portion including a hydraulic cylinder and a driven portion, the driven portion comprising an output shaft rotatably supported in the housing and configured to be rotated at intervals by a ratchet lever; a continuously active friction brake located in the housing, the continuously active friction brake being in contact with and applying a friction force between the output shaft and the housing, the friction brake having at least one friction shoe being oriented substantially radially with respect to the output shaft and one end of the friction shoe pressing against a circumferential friction surface of the output shaft; and a plurality of circumferentially arranged friction shoes, with one end of each of the plurality of the circumferentially arranged friction shoes being pressed against the output shaft by an associated adjustable tensioning device, and each associated adjuctable tensioning device comprising a tensioning wedge and an adjustable tensioning screw, the adjustable tensioning screw being arranged substantially orthogonal to another end of its associated friction shoe.