Patent ID: 7125213

Claim:
A washer, comprising a body having an axis, a radially outer part, a radially inner part and at least one resistive point, said radially outer part having a first bearing face surface located at one axial side and adapted to cooperate with a nut and a second bearing face surface located at an opposite axial side and adapted to cooperate with an object, said radially inner part having at least one third turning resistant surface adapted to cooperate with a thread of a bolt, so that when the nut is turned and turns the bolt said body of 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 said turning resistant surface an axial force which overcomes the at least one resistive point so that said radially outer part of said body does not move axially, while said radially inner part of said body of the washer with said turning resistant surface cooperating with the thread of the bolt is allowed to be pulled axially when the bolt elongates, wherein said radially outer part and said radially inner part are configured so that inside said radially outer part, an axial space remains, into which said radially inner part moves as it is pulled axially when the bolt elongates wherein said radially outer part and said radially inner part are configured so that inside said radially outer part, a free axial space remains, into which said radially inner part moves as it is pulled axially when the bolt elongates.