Tool having movable jaws for engaging each drive flank of a nut

A tool for engaging drive flanks of a threaded nut, comprising:

• a tool body having a central cavity with a longitudinal axis and an open end;
• a plurality of cam surfaces formed in an inner wall of the central cavity and extending around the axis in the central cavity;
• a retainer secured within the central cavity, the retainer having an annular slot extending around the axis and outwardly open to the central cavity;
• a jaw for each of the cam surfaces, each of the jaws having a first end at the open end of the central cavity and a second end recessed within the central cavity, each of the jaws having a curved outer side extending between the first and second ends in flush contact with one of the cam surfaces, each of the jaws having on an inner side a drive surface extending between the first and second ends for engaging one of the drive flanks of the nut;
• a foot extending inward from the second end of each jaw into the slot, retaining each of the jaws with the retainer;
• and wherein
• rotating the tool body relative to the jaws moves the drive surfaces of the jaws from a retracted position to a gripping position in engagement with the drive flanks of the nut.

A tool for engaging drive flanks of a threaded nut, comprising:

• a tool body having a central cavity with a longitudinal axis and an open upper end;
• a plurality of cam surfaces formed in an inner wall of the central cavity and extending around the axis;
• a central bore extending axially downward from a lower end of the central cavity;
• a retainer body rigidly secured within the central bore;
• a neck joining an upper end of the retainer body and protruding upward from the central bore into the central cavity;
• a head having a larger diametrical dimension than the neck on an upper end of the neck, the head and the retainer body having opposing surfaces at upper and lower ends of the neck that define an annular slot around the neck;
• a jaw for each of the cam surfaces, each of the jaws having an upper end at the upper end of the central cavity and a lower end recessed within the central cavity, each of the jaws having a curved outer side extending between the upper and lower ends of each of the jaws in flush contact with one of the cam surfaces, each of the jaws having on an inner side a drive surface extending between the upper and lower ends for engaging one of the drive flanks of the nut;
• a foot extending inward from the lower end of each jaw into the slot, restricting upward movement of each of the jaws relative to the retainer;
• and wherein
• rotating the tool body relative to the jaws moves the drive surfaces of the jaws from a retracted position to a gripping position in engagement with the drive flanks of the nut.