Washer, fastener provided with a washer

Tools – Wrench – screwdriver – or driver therefor – Machine

Reexamination Certificate

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Details

C081S057380, C411S005000, C411S010000, C411S368000, C411S433000, C411S531000, C411S533000

Reexamination Certificate

active

07066053

ABSTRACT:
A washer which has a body having a first bearing face surface at one axial side and adapted to cooperate with a nut, a second bearing face surface at an opposite axial side and adapted to cooperate with an object, at least one third turning resistant surface adapted to cooperate with a thread of the bolt, and at least one breaking point arranged so that when the nut is turned and turns the bolt the washer stops the bolt from turning and thereby the nut creates a pull on the bolt which elongates the bolt in an axial direction and applies to the washer an axial force which breaks said body of the washer and allows a portion of said body of the washer to be pulled axially when the bolt elongates; and also a fastener, a method of fastening objects, and a tool for fastening objects can be provided with the new washer.

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