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Weighing scale with load cell

  • US 4,196,784 A
  • Filed: 07/27/1978
  • Issued: 04/08/1980
  • Est. Priority Date: 08/01/1977
  • Status: Expired due to Term
First Claim
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1. A weighing scale including a load cell, comprising:

  • a fixed base;

    a perpendicular base side secured to said base;

    a perpendicular moving side for bearing a load;

    a first arm connecting the upper portions of said base side and said moving side;

    a second arm connecting the lower portions of said base side and said lower side, said sides and arms being integral with one another and together forming an integral parallelogram;

    a horizontal rib being integral with said sides and bridging said sides, said rib being discontinuous adjacent a midpoint along the length of said rib, the portions of said rib on either side of said discontinuity respectively forming a load transmission section and a stopper fitting section;

    a stopper fitted to said stopper fitting section and engagable with said load transmission section for restricting movement of said load transmission section in the vertical direction;

    a horizontal beam extending from said base side toward said moving side, said beam being integral with said base side and including a portion defining a parallelogram;

    a plurality of strain gauges bonded to said parallelogram; and

    a pivot shaft coupling the tip of said beam to said load transmission section.

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