Title:
COIL SPRING WIRE ROD AND COIL SPRING
Document Type and Number:
WIPO Patent Application WO/2017/073772
Kind Code:
A1
Abstract:
This coil spring wire rod is used for producing a coil spring, said coil spring wire rod comprising a helical core rod that is formed using a long member, and an FRP layer that is obtained by winding reinforcement fibers around the core rod and that covers the outer surface of the core rod, wherein the winding directions of the core rod and the reinforcement fibers are directions opposite one another with respect to the center axis of the coil spring wire rod.
Inventors:
KONOMI KAZUHIKO (JP)
IMAMURA MASARU (JP)
SANO TAKAMICHI (JP)
IMAMURA MASARU (JP)
SANO TAKAMICHI (JP)
Application Number:
PCT/JP2016/082173
Publication Date:
May 04, 2017
Filing Date:
October 28, 2016
Export Citation:
Assignee:
NHK SPRING CO LTD (JP)
International Classes:
F16F1/06; B29C70/06; B29C70/16; F16F1/366; B29K105/08; B29L31/00
Foreign References:
| US4473217A | 1984-09-25 | |||
| JPH0319140U | 1991-02-25 | |||
| JPH01269736A | 1989-10-27 | |||
| JPH0742778A | 1995-02-10 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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