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:
Feb. 07, 2012
Filed:
Mar. 22, 2007
Applicant:
Shuji Ando, Aikoh-gun, JP;
Inventor:
Shuji Ando, Aikoh-gun, JP;
Assignee:
NHK Spring Co., Ltd., Yokohama-Shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D 25/0638 (2006.01); F16D 13/52 (2006.01); F16F 1/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
A production method for coned disk springs includes: preparing a plate member; punching plural annular blanks from the plate member by pressing; and forming the blanks into coned disk springs. In the pressing, plural slits are formed at one of a peripheral portion and an inner peripheral portion of at least one of the blanks, and a smaller outer diameter blank among the blanks is punched from an inner region of a larger outer diameter blank among the blanks.