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Lifting device employing a weight integrative weighing system

  • US 5,824,963 A
  • Filed: 03/04/1997
  • Issued: 10/20/1998
  • Est. Priority Date: 03/04/1997
  • Status: Expired due to Fees
First Claim
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1. A weighing system for a device lifting a load comprising:

  • a frame;

    a sprocket-wheel attached to said frame to rotate about an axis;

    a carriage operationally coupled to said sprocket-wheel for movement relative to said frame;

    a load bearing member adapted to engage said load, said load bearing member connected to said carriage, with said load exerting a force upon said carriage;

    a sensing device, coupled between said frame and said carriage, said sensing device adapted to sense said force, a magnitude of which varies in relation to rotational movement of said sprocket-wheel, said sensing device thereby producing a sequence of force measurements corresponding to rotational movement of said sprocket-wheel;

    a detector having an output indicating an occurrence of a predetermined amount of rotational movement of said sprocket-wheel; and

    processing means, electronically coupled to said sensing means and to said output of said detector, for computing an average of a sequence of force measurements corresponding to said predetermined amount of rotational movement of said sprocket-wheel;

    whereby said average represents a weight calculation of said load.

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