Crosshead jam nut torque tool

  • US 6,279,427 B1
  • Filed: 11/19/1999
  • Issued: 08/28/2001
  • Est. Priority Date: 05/19/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. An improved torque wrench system, comprising:

  • a) a torque wrench body;

    b) a drive head mounted on a first end of the torque wrench body;

    c) a hydraulically powered cylinder mounted on the torque body and inter-connected between the torque body and the drive head for driving the drive head during loosening or tightening of the jam nut;

    d) a gated portion, defining less than 50% of the drive head, for moving between closed and open positions, so that in the open position, the head may be placed around a nut, and in the closed position, the gated portion defines a portion of the head which will be driven to rotate the nut to achieve desired torque.

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