Patent ID: 7757367
Filing Date: 2010-07-20
Classification: F16B,Y10T

Abstract:
1. A method for tightening a threaded fastener to clamp a thread-clamped member, the method comprising: providing a threaded fastener having a bearing surface, providing a thread-clamped member made of a material having a lower hardness than that of the threaded fastener, the thread-clamped member including a bearing surface having a smaller outer diameter than that of an outer diameter of the bearing surface of the threaded fastener that is to be in contact with the bearing surface of the thread-clamped member, initially tightening the threaded fastener to plastically deform a part of the bearing surface of the thread-clamped member that is in contact with the bearing surface of the threaded member; loosening the threaded fastener after initially tightening the threaded fastener and causing deformity in the bearing surface of the thread-clamped member; and tightening the threaded fastener according to an angle control method after loosening the threaded fastener.