- Patent Title: Leaf spring device and method for manufacturing leaf spring device
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Application No.: US15528047Application Date: 2015-11-10
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Publication No.: US10549594B2Publication Date: 2020-02-04
- Inventor: Hidenori Chihara , Hiroto Tsuji , Shinichiro Kuwatsuka
- Applicant: NHK SPRING CO., LTD.
- Applicant Address: JP Yokohama-shi, Kanagawa
- Assignee: NHK SPRING CO., LTD.
- Current Assignee: NHK SPRING CO., LTD.
- Current Assignee Address: JP Yokohama-shi, Kanagawa
- Agency: Merchant & Gould P.C.
- Priority: JP2014-234850 20141119
- International Application: PCT/JP2015/081643 WO 20151110
- International Announcement: WO2016/080249 WO 20160526
- Main IPC: B60G11/04
- IPC: B60G11/04 ; C21D9/02 ; B21D19/12 ; B21D53/88 ; F16F1/26 ; F16F3/02
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.
Public/Granted literature
- US20170313149A1 LEAF SPRING DEVICE AND METHOD FOR MANUFACTURING LEAF SPRING DEVICE Public/Granted day:2017-11-02
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