(57) An apparatus for tensioning a threaded stud or like member(s), which apparatus comprises
a plurality of jaws (46, 48, 50 and 52) to be arrayed about said member, each of said
jaws having an inner surface (56) adapted to engage the threads of said member(s),
and pull means (92) for applying a force to said jaws so as to apply axial tension
to said member(s), said apparatus being characterized by a rotatable actuator sleeve
(36) defining an axial opening (44) within which said jaws are disposed, said sleeve
defining interior cam surfaces (74, 76 and 78) so contoured as to force said jaws
to move radially inwardly into engagement with said member(s) when said sleeve (36)
is moved to a first rotational position and to permit said jaws to move radially outwardly
out of engagement with said member when said sleeve (36) occupies a second rotational
position.
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