Patent ID: 6929439
Filing Date: 2005-08-16
Classification: B25B,F16B,Y10S

Abstract:
1. A washer to be applied between an object and a nut threadingly connected with a bolt which has an axis and is introduced into the object including at least two parts to be assembled, the washer comprising a body having an axis and provided with a first bearing face surface located at one axial side and adapted to cooperate with the nut, a second bearing face surface located at an opposite axial side and adapted to cooperate with the object, and a third turning resistant surface adapted to be frictionally connected with a thread of the bolt while cooperating with it so that when the nut is turned with a given force in one direction and said body of the washer receives simultaneously said given force in an opposite direction, only the nut turns to tighten or loosen the bolt and said body of the washer remains rotation stationary while said bolt does not turn but elongates or relaxes in an axial direction, wherein said body being composed of two parts which are arranged radially near one another and include a radially inner part and a radially outer part, said inner part being provided with bolt thread engaging means, said parts being formed so that they are not freely rotatable relative to one another but are axially displacable relative to one another so as to prevent the bolt from turning along with the nut and to permit an axial movement of the bolt when it is pulled by the nut during turning of the nut; and further comprising means for connecting said parts with one another so that they are not freely rotatable relative to one another but axially movable relative to one another, said connecting means including means for press fitting said parts with one another.