Implements or apparatus for applying pushing or pulling force – Device or member for contacting and guiding moving cable – Including rotatable – cable contacting – pulley wheel element
Patent
1978-08-28
1980-03-11
Britts, Ramon S.
Implements or apparatus for applying pushing or pulling force
Device or member for contacting and guiding moving cable
Including rotatable, cable contacting, pulley wheel element
241226, 52223L, 254 29A, E04C 326, E21B 1900, F16B 1700
Patent
active
041922158
ABSTRACT:
An apparatus and a method are disclosed for inducing torsion-free axial tensile stress in a tendon. The apparatus includes tapered wedge-grippers mounted on the tendon, an externally threaded hollow sleeve member with tapered inner surfaces concentrically mounted on the wedge grippers, and an internally threaded nut placed around the sleeve and in contact with a cooperating bearing surface through which the tendon projects. The sleeve is provided with a head having at least a pair of parallel surfaces which are engagable by a torque wrench for restraining it against rotation as the nut is rotated with a second torque wrench. The resultant movement of the sleeve together with interaction of the members of the apparatus results in torsion-free axial tensile stress in the tendon.
REFERENCES:
patent: 1638300 (1927-08-01), Gagnon
patent: 1712108 (1929-05-01), Goeller
patent: 2699589 (1955-01-01), Redell
patent: 3309744 (1967-03-01), Sironi et al.
patent: 3387417 (1968-06-01), Howlett
patent: 3412511 (1968-11-01), Dietrich
patent: 3478396 (1969-11-01), Drouillard
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