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Apparatus for lifting objects having a hollow cylindrical core with remote power-actuated release

  • US 6,010,171 A
  • Filed: 02/03/1998
  • Issued: 01/04/2000
  • Est. Priority Date: 02/03/1998
  • Status: Expired due to Fees
First Claim
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1. Apparatus for lifting objects having a vertically oriented, hollow cylindrical core comprising:

  • a) means for connecting a lifting device;

    b) a vertically-extending plate having a front provided with a horizontal aperture;

    c) linkage means connecting said means for connecting a lifting device to said vertically-extending plate;

    d) a hollow sleeve having an upper end and a lower end and dimensioned to be inserted into said core and comprising at the lower end thereof a plurality of pivotable jaw segments forming a diametrically expandable lower end;

    e) a transverse plate having an upper surface attached to the upper end of said sleeve, said transverse plate having a diameter greater than said core;

    f) a latch assembly provided with a horizontally extending bolt biased to extend into said aperture in said vertically-extending plate when said vertically-extending plate is in a lowered position and handle means for releasably retracting said horizontally extending bolt from a first extended position into a second retracted position;

    g) a rod extending through said hollow sleeve connected at the upper end thereof to said vertically-extending plate and having secured to the lower end thereof a mandrel having outwardly tapered sides adapted to engage said pivotable jaw segments;

    h) spring means positioned in said hollow sleeve thereby biasing said rod downwardly in said hollow sleeve; and

    i) power-operated means for remotely and reversibly securing or releasing said horizontally-extending bolt.

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