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

• Current Assignee: Louis Castel Gerard Antoine
• Original Assignee: Louis Castel Gerard Antoine
• Inventors: LOUIS CASTEL GERARD ANTOINE
• Application Number:
  US04/450,864
• Time in Patent Office: 820 Days
• US Class Current: 411/155
• CPC Class Codes: F16B 39/24 by means of washers, spring washers, or resilient plates that lock against the object locking to the screw-thread F16B39/14 , F16B39/34, F16B39/36
• CPC Class Codes: Y10S 411/957 Biting tooth
• CPC Class Codes: Y10S 411/96 Friction

Claims

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.