×

Process and device for setting up and controlling a hydraulic chucking of one or a plurality of bolts

  • US 20100005663A1
  • Filed: 08/20/2007
  • Published: 01/14/2010
  • Est. Priority Date: 09/01/2006
  • Status: Active Grant
First Claim
Patent Images

1. A method of establishing and checking the axial preload in a tightening portion of at least one shank of the screw or stud type, the method comprising the steps of:

  • tensioning an extension portion of the shank having the tightening portion using a shank gripper member and a tensioner to establish a preload;

    disposing the tensioner in a rest configuration and bringing the gripper member into contact with the tensioner in said rest configuration prior to establishing the preload;

    returning the tensioner to said rest configuration after establishing the preload, the tensioner in said rest configuration being pressed toward one end of the extension portion; and

    comparing the difference between the initial length and the final length of the extension portion with a threshold.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×