Implements or apparatus for applying pushing or pulling force – Pipe or rod jack – Tie rod tensioner
Patent
1981-01-29
1984-02-28
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Pipe or rod jack
Tie rod tensioner
E21B 1900
Patent
active
044338287
ABSTRACT:
A quick-acting stud tensioner tool for enabling the loosening or tightening of a stud nut on a reactor vessel stud. The tool engages the vessel stud by closing a gripper mechanism around an upper end of the vessel stud upon a transfer of the mass of the tool from a hoist to a support structure surrounding the vessel stud. After the stud has been elongated, the gripper mechanism releases the vessel stud when the mass of the tool is transferred from the support structure surrounding the vessel stud to the hoist.
REFERENCES:
patent: 3995828 (1976-12-01), Orban
patent: 4074890 (1978-02-01), Boudet et al.
patent: 4175453 (1979-11-01), Exner et al.
patent: 4315446 (1982-02-01), Orban
Beer Robert W.
Cognevich Michael L.
Malandra Louis J.
Salton Robert B.
Spiegelman Stanley R.
Possessky E. F.
Watson Robert C.
Westinghouse Electric Corp.
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