Coil spring manufacturing method and coil spring manufacturing device

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11065641
APP PUB NO 20180361424A1
SERIAL NO

16100053

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Abstract

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Provided is a coil spring manufacturing method. In the coil spring manufacturing method, a coil spring of a vehicle suspension member is immersed in a fluidized bed in which powder coat is fluidized for coating. The fluidized bed includes a vertical stream area in which the powder coat moves upward and downward. The coil spring is immersed in the vertical stream area of the fluidized bed while an end coil of the coil spring faces upward, and is periodically subjected to a relative movement with respect to a direction containing components vertical to a central axis of the coil spring in relation to the vertical stream area.

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Patent Owner(s)

Patent OwnerAddress
NHK SPRING CO LTDYOKOHAMA-SHI KANAGAWA 236-0004

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Koyama, Yoshimitsu Kitakami, JP 1 2
Sugiyama, Mitsuhiro Yokohama, JP 39 390
Watanuki, Tatsuya Yokohama, JP 27 649

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