Coil spring

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11940031
APP PUB NO 20230304557A1
SERIAL NO

17703295

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A coil spring includes a wire rod and an elastic coat provided on the wire rod. The coil spring includes a coil section including a plurality of coil portions. The wire rod includes a round cross-sectional portion, a cross-section varying portion, and a rectangular cross-sectional portion along the longitudinal direction of the wire rod. The cross section of the rectangular cross-sectional portion is substantially square and has a first plane and a second plane. The first plane and the second plane oppose each other in the coil section. The elastic coat is provided on at least one of the first plane and the second plane. The elastic coat is continuous from the round cross-sectional portion to the cross-sectional variation portion and the rectangular cross-sectional portion.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
NHK SPRING CO LTDKANAGAWA KANAGAWA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Arisaka, Norifumi Yokohama, JP 3 0
Ibano, Daisuke Yokohama, JP 4 0
Ito, Chihiro Yokohama, JP 14 26
Kawasaki, Asuka Yokohama, JP 4 0
Kinoshita, Masatake Yokohama, JP 4 1
Matsuda, Tsuyoshi Yokohama, JP 49 423
Muramatsu, Shun Yokohama, JP 4 0
Nishizawa, Shinichi Walled Lake, US 29 117
Suzuki, Takuto Yokohama, JP 14 43

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