Method of making direct tension indicating washers

Details Method of making direct tension indicating washers Method of making direct tension indicating washers

2011-08-23

2011-08-23

Tolan, Edward (Department: 3725)

Threaded, headed fastener, or washer making: process and apparat

Process

Making washer

C470S047000

Reexamination Certificate

active

08002641

ABSTRACT:
A method of making a direct tension indicating washer including: forming a first surface having a discrete protuberance formed thereon; forming a second surface having a discrete indentation formed opposite the protuberance; and positioning an indicating material in the indentation, wherein the indicating material has a cured skin on an outside of the indicating material and a liquid core in an interior of the indicating material.

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