Patent ID: 8978232
Filing Date: 2015-03-17
Classification: B25B,F16B,Y10T

Abstract:
1. A method of tightening and loosening threaded connectors in an object, comprising the steps of threadingly connecting a nut with a bolt having an axis and introduced in the object with interposition of a washer between the nut and the object so that a washer first bearing face surface on one axial side cooperates with the nut and a washer second bearing face surface on an opposite axial side cooperates with the object; turning the nut by a tool so as to tighten or loosen the bolt in the object with interposition of the washer; forming the washer with an outer body having a radially inner opening larger than a diameter of the bolt, a radially outer surface adapted to absorb a reaction force of the tool, the outer body formed with a radially inner surface engageable with a radial outer surface of a radially inner segment, the radially inner segment insertable into the radial inner opening of the outer body and including a radially inner surface engageable with a thread of the bolt, wherein said radial outer surface of the radially inner segment is connectable to the radially outer body with a limited axial frictional movement relative to the outer body through use of axial splines or interengaging press fitting such that the washer functions as a tension washer; and interposing only said radially outer body of the washer between the nut and the object for regular applications when an even and accurate bolt elongation is not necessary and using the radially outer surface of the body to absorb a reaction force of the tool, so that when the tool applies a turning force to the nut and an equal but opposite reaction force to the radially outer body the nut turns while the radially outer body stands still, and in this case the washer composed only of the radially outer body functions as a reaction washer.