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. 04, 2020
Filed:
Nov. 10, 2015
Applicant:
Nhk Spring Co., Ltd., Yokohama-shi, Kanagawa, JP;
Inventors:
Assignee:
NHK SPRING CO., LTD., Yokohama-shi, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60G 11/04 (2006.01); C21D 9/02 (2006.01); B21D 19/12 (2006.01); B21D 53/88 (2006.01); F16F 1/26 (2006.01); F16F 3/02 (2006.01);
U.S. Cl.
CPC ...
B60G 11/04 (2013.01); B21D 19/12 (2013.01); B21D 53/886 (2013.01); C21D 9/02 (2013.01); F16F 1/26 (2013.01); F16F 3/023 (2013.01); C21D 2221/01 (2013.01); F16F 2226/02 (2013.01);
Abstract
A leaf spring device includes a main leaf made of a steel plate including an elastic section configured to generate elastic force when bent; and an eye section formed in an end portion of the elastic section, the elastic section and the eye section being tempered. There is also provided a method for manufacturing the leaf spring device. The eye section is formed by rolling the end of the elastic section into a circular form. The eye section is tempered at a higher temperature than the elastic section.