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Programmable pulsed torque recovery system

  • US 5,094,301 A
  • Filed: 03/05/1990
  • Issued: 03/10/1992
  • Est. Priority Date: 01/05/1990
  • Status: Expired due to Term
First Claim
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1. In an electric nutrunner joint fastening system including one or more electric nutrunners having a motor and gearing, the improvement comprising:

  • a pulse torque nutrunner control circuit providing for one or more torque pulses at the end of each fastener tightening cycle to recover torque loss due to joint relaxation while maintaining said nutrunner motor under load so as to avoid excessive gear wear.

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  • 3 Assignments
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