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Sleeve for a drum brake adjuster screw

  • US 5,377,793 A
  • Filed: 12/28/1993
  • Issued: 01/03/1995
  • Est. Priority Date: 12/28/1993
  • Status: Expired due to Fees
First Claim
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1. An automotive drum brake assembly, comprising:

  • (a) a backing plate;

    (b) brake shoe assemblies mounted on the backing plate for guided braking movement;

    (c) a wheel cylinder for braking actuation of the brake shoe assemblies; and

    (d) an adjuster screw assembly for maintaining desired positions of the brake shoe assemblies, the adjuster screw assembly including(i) a pivot nut,(ii) a screw threadingly mated on to the pivot nut,(iii) means for rotating the screw as the brake shoe assemblies wear,(iv) an adjuster spring connected to each brake shoe assembly adjacent the pivot nut and screw, and(v) a sleeve covering a portion of the screw unthreaded from the pivot nut, the sleeve having a portion of sufficient diameter to contact the adjuster spring and, responsive to said contact, is slid to an extended position as the screw is unthreaded from the pivot nut.

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