Stud wrench

In a tool wrench for wrenching a shaft, the combination comprising:

• a housing having an axial recess therein;
• a pawl having a yoke at one end, said pawl being connected to said housing for rotation about a pawl pivot;
• a first clamping jaw in said recess, said first jaw having a toothed face for clamping a portion of said shaft;
• a second clamping jaw in said recess, said second jaw having a toothed face for clamping a diametrically-opposed portion of said shaft;
• said first jaw being disposed for limited sideways movement within said recess so as to open said clamping jaws to allow said tool wrench to be mounted over or to be removed from said shaft to be wrenched;
• a wrenching actuator having a pivot connected to the pawl yoke for rotating said pawl in one direction thereby to open said jaws;
• a clamping actuator mounted on said housing for turning said pawl in an opposite direction thereby to close said jaws and to clamp said jaws to said shaft, whereby said pawl, said housing, and said jaws become locked for simultaneous forced rotation with said shaft;
• and
• said wrenching actuator torquing said pawl in said opposite direction, while said clamping actuator produces its clamping action, thereby to simultaneously rotate said jaws, said housing, and said shaft.

A power wrench assembly comprising:

• a wrench member defining an aperture for loosely receiving a member to which torque is to be applied by the wrench assembly;
• a pawl pivotably connected with the wrench member, the pawl having an outer end projecting outwardly from the wrench member, and an inner end extending into the aperture;
• a pair of jaws being provided in the aperture whereby, in use of the assembly, one of the jaws is disposed between the inner end of the pawl and one side of the member to which torque is to be applied and the other jaw is disposed between the wrench member and an opposite side of the member;
• a clamp actuator being mounted on the wrench member and having a ram which is adapted to push against the pawl to cause the pawl to rotate relatively to the wrench member, whereby the jaws are forcibly clamped to the member to which torque is to be applied;
• and
• a wrench driver being coupled to the outer end of the pawl for applying a torque to the clamped jaws and to the member.

In a tool wrench for wrenching a member, the combination comprising:

• a housing having an axial recess therein;
• a pawl having a yoke at one end, said pawl being connected to said housing for rotation about a pawl pivot;
• a first clamping jaw in said recess for clamping a portion of said member;
• a second clamping jaw in said recess for clamping an opposite portion of said shaft;
• a wrenching actuator adapted to be coupled to said pawl yoke for rotating said pawl in one direction thereby to open said jaws;
• and
• a clamping actuator for turning said pawl in an opposite direction thereby to close said jaws.