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Constant torque pivot assembly

  • US 4,315,614 A
  • Filed: 05/16/1977
  • Issued: 02/16/1982
  • Est. Priority Date: 05/16/1977
  • Status: Expired due to Term
First Claim
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1. A pre-assembled constant torque pivot assembly for connecting an apertured pivot arm supporting a mirror or the like to an apertured support bracket, said support bracket being adapted for coupling without modification, to either the left-hand or the right-hand side of a vehicle comprising:

  • a pivot axle extending through said pivot arm and support bracket apertures and retaining said pivot arm and support bracket in lap joint relationship to one another;

    a first frictional washer fabricated of a noncorrosive material and mounted on said pivot axle between said pivot arm and said support bracket;

    a second frictional washer mounted on said pivot axle on the other side of one of said pivot arm or support bracket, said second frictional washer being fabricated of a noncorrosive material;

    a spring washer mounted on said pivot axle on the outside of said second washer from said pivot arm and support bracket and bearing directly against said second washer; and

    said pivot axle having two longitudinally and rotationally fixed, nonadjustable heads;

    one head being at each end of a shank between said heads;

    said pivot arm, said support bracket, said first washer, said second washer and said spring washer being mounted on said shank;

    said heads being spaced sufficiently close together to retain said spring washer in compression to provide a compressive force between said two heads which is applied to said first and second washers whereby relative rotation between said pivot arm and said support bracket is resisted by a constant torque.

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