×

Variable speed pulley

  • US 4,838,835 A
  • Filed: 08/04/1988
  • Issued: 06/13/1989
  • Est. Priority Date: 06/30/1986
  • Status: Expired due to Fees
First Claim
Patent Images

1. A variable speed pulley comprising:

  • a first sheave half;

    means for fixedly mounting the first sheave half on a rotatable shaft defining an axis of rotation;

    a second sheave half;

    means for coaxially movably mounting said second sheave half on said shaft adjacent said first sheave half to define a belt receiving groove therebetween;

    means for biasing said second sheave half axially of the shaft to vary the width of said belt receiving groove, said means for biasing said second sheave half comprising means for biasing said second sheave half away from said first sheave half to increase the width of said belt receiving groove;

    means for urging said second sheave half axially of the shaft against the biasing force of said biasing means with a force proportional to the speed of rotation of said shaft to vary the width of said belt receiving groove, said urging means comprising means for urging said second sheave half toward said first sheave half to reduce the width of said belt receiving groove and comprising means movable with said second sheave half defining a movable surface;

    means fixedly associated with said shaft defining a fixed surface;

    force applying means extending between said movable surface and said fixed surface and having a variable extension parallel to said shaft axis proportional to the centrifugal force acting thereon as a result of said speed of rotation of the shaft; and

    rearrangement means for varying the arrangement of said force applying means as an incident of a relative movement between said first and second sheave halves angularly about said axis of rotation.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×