×

Tension indicator for fastener means

  • US 4,020,734 A
  • Filed: 11/26/1975
  • Issued: 05/03/1977
  • Est. Priority Date: 11/26/1975
  • Status: Expired due to Term
First Claim
Patent Images

1. A tension indicator for use with fastener means such as cooperating nut and bolt that are adapted to be applied to a workpiece, said tension indicator comprising a pair of washers adapted to be placed on the fastener means between a load applying surface thereof and the workpiece, each of said washers including opposing concave and convex surfaces, a central portion of each of said washers having a hole therethrough from said concave surface to said convex surface for receiving the fastener means, the concave surfaces of the pair of washers facing in opposite directions toward each other in an assembled condition, each of said washers further including at least one finger extending outwardly from said central portion, said one finger of each washer including an outermost end face disposed between opposing faces integrally extending from said concave and convex surfaces and between opposing sides thereof, said one finger of each washer being disposed in a side-by-side relationship to each other in said assembled condition with one of said sides of each finger being adjacent to each other, said end faces being inclined at different angles with respect to each other in said assembled condition without any load being applied to said washers, said end faces of said fingers being aligned side-by-side with each other only when a predetermined load has been applied to said washers and the fastening means, and retention means disposed on at least one of said washers for preventing relative rotation between said washers to maintain said side-by-side relationship of said fingers.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×