A Reversible Wrench

A reversible wrench that comprises

• a handle;
• a carrier arranged on the handle;
• and
• a torque transmission assembly arranged in the carrier, the assembly including
• an inner driven member having an inner, outwardly facing bearing surface and an outer driving member having an outer, inwardly facing bearing surface, the driven and driving members being arranged in the carrier about a common rotation axis and the surfaces being spaced from each other;
• a selector positioned between the bearing surfaces;
• at least one motion transfer device positioned between the bearing surfaces, the bearing surfaces, the selector and the at least one motion transfer device defining at least two roller bearing passages;
• at least one roller bearing positioned in each passage, the bearing surfaces of each passage being profiled so that the roller bearings can be shifted between a tightening condition in which the roller bearings lock the bearing surfaces together for tightening rotation of the carrier and a loosening condition in which the roller bearings lock the bearing surfaces together for loosening rotation of the carrier and such that opposite rotation of the carrier with respect to the tightening and the loosening rotation, respectively, unlocks the roller bearings to permit freewheeling of the carrier with respect to the inner driving member during the opposite rotation;
• and
• the selector and the at least one motion transfer device are configured so that the selector is operable to shift the roller bearings between the tightening and loosening conditions, via the at least one motion transfer device, a biasing mechanism being operatively arranged with respect to the roller bearings and configured so that the roller bearings are unlocked against a bias of the biasing mechanism during the opposite rotation and are driven back into one of the tightening and loosening conditions upon ceasing of the opposite rotation.