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:
Mar. 29, 2022
Filed:
Mar. 02, 2018
Applicant:
Nhk Spring Co., Ltd., Yokohama, JP;
Inventors:
Noriyoshi Kaneda, Kanagawa, JP;
Takeshi Suzuki, Kanagawa, JP;
Assignee:
NHK SPRING CO., LTD., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16B 33/02 (2006.01); F16B 35/04 (2006.01); F16B 33/06 (2006.01); C22C 21/00 (2006.01);
U.S. Cl.
CPC ...
F16B 33/02 (2013.01); F16B 33/06 (2013.01); F16B 35/04 (2013.01); C22C 21/00 (2013.01);
Abstract
A fastening member includes a screw thread formed therein. A portion including a crest portion of the screw thread is formed of a first alloy material and includes: a thick portion where the portion is maximized in thickness in a circumferential direction; and a thin portion where the portion is minimized in thickness in the circumferential direction. A portion including a root of the screw thread is formed of a second alloy material having a tensile strength higher than that of the first alloy material.