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Spring activated automatic drum brake adjuster

  • US 5,226,511 A
  • Filed: 10/28/1992
  • Issued: 07/13/1993
  • Est. Priority Date: 10/28/1992
  • Status: Expired due to Term
First Claim
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1. An automatic adjuster for a drum brake, comprising oppositely disposed first and second end members each having reception means for nonrotatable engagement with a respective drum brake shoe, the first end member having a radially expanded end portion defining therein a cavity which includes a conically shaped surface, the second end member connected with a longitudinally extended shaft having a threaded opening therein, an intermediate member disposed between the first and second end members and having at one end a threaded shaft received within said threaded opening and the other end including a conically shaped member engaging the conically shaped surface of the first end member and having a radial surface, a bearing member disposed about the intermediate member and adjacent the conically shaped member, the bearing member having a radially extending flange engaging the end portion of the first end member and a radially extending surface engageable with the radial surface of said conically shaped member, and a spring member located about said longitudinally extended shaft and intermediate member such that one spring end engages said longitudinally extended shaft and the other spring end engages the flange of the bearing member, the spring biasing the flange of the bearing member into engagement with the end portion of the first end member, the conically shaped surface engaged by the conically shaped member such that the radial surface of the conically shaped member is disposed a predetermined distance from said radially extending surface of the bearing member to define a running clearance for the drum brake.

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