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Motorized load rotation device with autonomous power supply for cable lifting mechanisms

  • US 5,071,184 A
  • Filed: 07/18/1990
  • Issued: 12/10/1991
  • Est. Priority Date: 07/18/1989
  • Status: Expired due to Fees
First Claim
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1. Motorized load rotating device with autonomous power supply for cable lifting mechanisms comprising a pulley block body having several lines and several pulleys over which passes at least one lifting cable forming a block and tackle, a grappling element mounted to turn around a substantially vertical axis connected to pulley block body and accommodating a means to grip a load to be handled, motorization to drive said grappling element in rotation (Arrow F) around said axis, a rotating power generator driven by at least one pulley of said pulley block body over which said lifting cable passes, and power storage means charged by a generator for supplying the power needed to feed the motorization to rotate said grappling element, said pulley block body further incorporating devices to receive command signals and to control generator and motorization feed,said generator for the power to feed the motorization to rotate the grappling element comprising an electric current generator having a rotor driven mechanically in rotation by said pulleys of said pulley block body,said power storage means being means for storing electricity,said motorization to rotate grappling element being an electric motor means andthe same means to store electricity also feeding the mechanisms for receiving command signals and signals for the control of electric current generator and the electric motorization feed,wherein said electric current generator held by pulley block body is an alternator with incorporated rectifier bridge and regulator having a rotor which is driven in rotation by pulley of pulley block body operating at high speed, said alternator ensuring the charging of at least one accumulator constituting the electricity storage means.

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