The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 21, 2005
Filed:
Jul. 12, 2000
Kiyotaka Iwata, Shinagawa-Ku, JP;
Kiyotaka Iwata, Shinagawa-Ku, JP;
Iwata Bolt Kabushiki Kaisha, Tokyo-To, JP;
Abstract
A self-locking bolt has a head with a bearing surface and a threaded part extending from the bearing surface and provided with an external thread of a pitch P for fastening to a first member when the head and threaded part are rotated in a fastening direction. There are n locking projections or recesses at equal angular intervals on the bearing surface, heights or depths of the locking projections or recesses from the bearing surface increasing or decrease gradually in a direction opposite the fastening direction from maximums to minimums with edges of the locking projections or recesses at junctions of the bearing surface and end walls of the locking projections or recesses at the maximums. The maximum height of the edge of the locking projections from the bearing surface of the head is nearly equal to and less than P/n. A second member that is between the bearing surface and the first member when the head and threaded part are rotated in the fastening direction bulges into the locking recesses.