Invention Grant
- Patent Title: Coil spring
- Patent Title (中): 线圈弹簧
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Application No.: US13388247Application Date: 2010-04-26
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Publication No.: US08876095B2Publication Date: 2014-11-04
- Inventor: Nobuharu Kato , Hirotaka Yamada , Jinetsu Kano , Takeshi Yabushita
- Applicant: Nobuharu Kato , Hirotaka Yamada , Jinetsu Kano , Takeshi Yabushita
- Applicant Address: JP Kanagawa
- Assignee: NHK Spring Co., Ltd.
- Current Assignee: NHK Spring Co., Ltd.
- Current Assignee Address: JP Kanagawa
- Agency: Jordan and Hamburg LLP
- Priority: JP2009-179621 20090731
- International Application: PCT/JP2010/002994 WO 20100426
- International Announcement: WO2011/013278 WO 20110203
- Main IPC: F16F1/06
- IPC: F16F1/06 ; F16F1/04
Abstract:
A coil spring has a spring wire that is wound in a coil shape and whose sectional outer basic shape is circular and flat faces are formed between coil inner and outer diameter sections of a sectional outer shape of the spring wire, wherein a flattening T/W of the sectional outer shape with the flat faces in the coil axis direction is set so that a stress ratio is equal to or lower than a stress ratio of a coil spring whose sectional outer shape is circular.
Public/Granted literature
- US20120193848A1 COIL SPRING Public/Granted day:2012-08-02
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