Threaded member with swelling spring washer and check mechanism

Application Number: 00108049
Application Date: 2000.06.06
Publication Number: 1276489
Publication Date: 2000.12.13
Priority Information: 1999/6/7 JP 160235/1999
International: F16B39/26;F16B39/28
Applicant(s) Name: Ageta Zhumei
Inventor(s) Name: Ageta Takeshi
Patent Agency Code: 72002
Patent Agent: huang jianfeng
Abstract The present invention provided screws having a locking mechanism with reliable stop locking property. A plurality of projections are provided on both face and back sides of a spring washer, or either side thereof. The projections on one side are engaging projections, and the projections on the other side are biting projections. The screws having the locking mechanism have recesses capable of accommodating a flat washer or the spring washer with or without projections on the back side of the screws. A locking projection is provided in the recess, having a ride-over inclined surface and a loosening regulation part.