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Tensioning device for prestressing a rod, and related tensioning method

  • US 20050165397A1
  • Filed: 12/20/2004
  • Published: 07/28/2005
  • Est. Priority Date: 06/20/2002
  • Status: Active Grant
First Claim
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1. A device for tensioning a threaded rod (1) comprising an actuator (5) capable of exerting an axial tensioning force, a puller (6) for transmitting the axial tensioning force from the actuator (5) toward a threaded end (1b) of the rod (1), the puller (6) comprising at least two jaws (31) which can move between a closed position in which the puller (6) is in engagement with a threaded end (1b) of a rod (1), and an open position in which the jaws (31) are disengaged from the threaded rod (1), and a locking element (45) which can move between a stable position for opening the jaws (31) and a stable position for closing the jaws (31), characterized in that the locking element comprises a sleeve (46) sliding axially between the jaws (31) and provided, over an axial segment of the sleeve (46), with bulges (47) for separating the jaws (31).

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