公开(公告)号：US10808784B2

公开(公告)日：2020-10-20

申请号：US16086812

申请日：2017-03-07

Applicant: NHK Spring Co., Ltd.

Inventor： Yoshiki Ono ,  Kazuhiko Konomi ,  Takamichi Sano ,  Masaru Imamura ,  Toshiaki Maruichi

IPC: F16F1/366 ,  F16F1/06 ,  C08J5/04 ,  B29C70/06 ,  F16F1/14 ,  B29K307/04 ,  B29L31/00

Abstract: The coil spring according to the present invention is a coil spring that is formed by spirally winding a wire rod and that includes a core that is elastically deformable and a reinforced fiber layer including reinforcing fibers wound around an outer circumference of the core and a thermoset resin that firmly adheres the reinforcing fibers to one another, wherein, in at least a part of a surface layer of the reinforced fiber layer, a content percentage of the reinforcing fibers on an inner circumferential side of the coil spring is larger than a content percentage of the reinforcing fibers on an outer circumferential side of the coil spring.

公开(公告)号：US20190063536A1

公开(公告)日：2019-02-28

申请号：US16086812

申请日：2017-03-07

Applicant: NHK Spring Co., Ltd.

Inventor： Yoshiki Ono ,  Kazuhiko Konomi ,  Takamichi Sano ,  Masaru Imamura ,  Toshiaki Maruichi

IPC: F16F1/06 ,  C08J5/04 ,  F16F1/366 ,  F16F1/14 ,  B29C70/06

Abstract: A coil spring includes: a core that is elastically deformable; and a reinforced fiber layer including reinforced fibers wound around an outer circumference of the core, and a thermoset resin that firmly adheres the reinforced fibers to one another. In at least a part of a surface layer of the reinforced fiber layer, a content percentage of the reinforced fibers on an inner circumferential side of the coil spring is larger than a content percentage of the reinforced fibers on an outer circumferential side of the coil spring.