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Test method and device for screwers

  • US 5,886,246 A
  • Filed: 07/14/1997
  • Issued: 03/23/1999
  • Est. Priority Date: 07/15/1996
  • Status: Expired due to Term
First Claim
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1. A test method for a screwer comprising the steps of:

  • connecting the screwer to a rotatable attachment element;

    powering the screwer to rotate the attachment element;

    measuring the attachment element speed;

    power-supplying an electric motor to bring the electric motor to a speed close to said measured speed of the attachment element;

    connecting a driving shaft of the electric motor to the attachment element;

    causing the motor to follow a braking ramp while the torque transmitted from the screwer to the driving shaft is measured.

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  • 3 Assignments
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