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Power-delivery belt-tensioning system

  • US 4,781,665 A
  • Filed: 08/31/1987
  • Issued: 11/01/1988
  • Est. Priority Date: 08/31/1987
  • Status: Expired due to Term
First Claim
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1. A power-delivery belt-tensioning system comprising:

  • a source of rotary motive power;

    a first pulley mounted for rotation about a predetermined axis;

    means for coupling said power from said source to said pulley;

    a second pulley mounted for rotation about a given axis spaced from and parallel to said predetermined axis;

    a driven device responsive to rotary power;

    means for coupling rotary power from said second pulley to said driven device;

    a flexible endless belt seated on and circling around said first and second pulleys to deliver power from said first pulley to said second pulley;

    an idler pulley mounted for rotation about another axis parallel to said given axis and displaceable to move said idler pulley toward and away from said belt with said idler pulley being aligned with said first and second pulleys to seat against a portion of said belt and, during operation, normally said belt in a preselected degree of tension;

    means associated with said power delivery system for changing the level of power available to be delivered to said driven device;

    means for resiliently urging said idler pulley against said belt to create tension in said belt;

    and means responsive to a surge in power delivered from said source to said driven device, with consequent incremental increase of tension in said belt, for maintaining said preselected degree of tension in said belt upon cessation of said surge in power.

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