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LOCK WASHER

  • US 3,680,619 A
  • Filed: 09/04/1970
  • Issued: 08/01/1972
  • Est. Priority Date: 06/03/1968
  • Status: Expired due to Term
First Claim
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1. A lock washer comprising a length of wire formed into a helical configuration, said lock washer being formed with a generally radially directed slit at a predetermined angle to the axis of said lock washer, whereby the end portions of said lock washer define inclined abuttingly engageable surfaces which are axially offset when said lock washer is in a substantially unstressed condition, said lock washer having radially spaced inner and outer surface portions inclined radially outwardly and upwardly relative to the axis of said lock washer, and axially spaced upper and lower surface portions joining the axial extremities of said inner and outer surfaces, said upper and lower surface portions being inclined radially inwardly and upwardly when said lock washer is in a substantially unstressed and partially stressed condition, whereby said lock washer assumes a generally conical configuration when said end portions thereof are biased into substantial axial alignment with said inclined surfaces abuttingly engaged, said abuttingly engaged inclined surface causing said end portions to cooperatively rotate upon further stressing to bias said lower surface portion to a position substantially perpendicular to the axis of said lock washer when the same is in a substantially stressed condition.

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