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Lock-washers

  • US 3,332,464 A
  • Filed: 04/26/1965
  • Issued: 07/25/1967
  • Est. Priority Date: 06/26/1961
  • Status: Expired due to Term
First Claim
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1. A CONVEX SPRING WASHER FOR LOCKING A THREADED FASTENER HAVING A FLAT CLAMPING FACE, COMPRISING A GENERALLY ANNULAR AND CURVED SOLID BODY OF SPRING METAL HAVING PLAIN INNER AND OUTER PERIPHERIES, SAID INNER PERIPHERY DEFINING A CIRCULAR CENTRAL HOLD, SAID OUTER PERIPHERY HAVING IN PLAN A CONTINUOUSLY CONVEX OUTLINE RADIALLY SPACED OUTWARDS FROM THE CONTOUR OF SAID CLAMPING FACE OF SAID FASTENER;

  • SAID BODY BEING FORMED WITH A SUBSTANTIALLY FLAT, FRUSTO-CONICAL RADIALLY INNER PORTION SURROUNDING SAID CENTRAL HOLE, SAID RADIALLY INNER PORTION BEING SEPARATED FROM THE RADIALLY OUTER PORTION OF SAID BODY BY STRUCTURAL DISCONTINUITY IN THE CURVATURE OF THE LATTER ALONG A CIRCUMFERENCE, THE INTERSECTION OF SAID RADIALLY INNER AND RADIALLY OUTER PORTIONS ALONG SAID CIRCUMFERENCE DEFINING SUBSTANTIALLY AN OBTUSE ANGLE OF LESS THAN 180* AT THE INNER SURFACE OF SAID WASHER, SAID RADIALLY INNER PORTION BEING FORMED WITH A PLURALITY OF SERRATIONS RUNNING SUBSTANTIALLY RADIALLY ON ITS OUTER OR CONVEX FACE, SAID SERRATIONS BEING ADAPTED TO BITE IN SAID CLAMPING FACE OF SAID FASTENER.

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