Ratchet type power wrench

Abstract

A ratchet type power wrench includes a housing, a pressure medium powered actuator, a ratchet mechanism included in the housing and coupled to the actuator, an open ended output socket with a constant cross sectional dimension throughout a length thereof, which is rotatably supported in the housing and engaged by the ratchet mechanism, and an angle encoder provided to indicate angular displacements of the output socket. The angle encoder has a form of a separate unit included in a casing, the casing being attachable to either side of the housing for connecting the angle encoder to either end of the output socket. The angle encoder includes a rotatable signal initiating part and a movement sensor rigidly mounted in the casing, the rotatable signal initiating part being provided with at least one coupling dog adapted to engage cavities located at both ends of the output socket.

Dependencies are inferred from the claim text.