Hollow spring member and manufacturing method therefor

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11285776
APP PUB NO 20190030980A1
SERIAL NO

16146269

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Abstract

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A terminal sealed portion is formed on an end portion of a hollow rod made of steel. An enclosed space is formed on an inner side of the hollow rod. At an end of the enclosed space, a terminal gap is formed. A volatile powdered rust inhibitor is supplied in the enclosed space. As the volatile powdered rust inhibitor is vaporized, the enclosed space is turned into a rust-inhibiting atmosphere. As the vaporized component of the volatile powdered rust inhibitor is adsorbed to an inner surface of the enclosed space, an inner surface rust-inhibiting film is formed. The vaporized component also enters inside the terminal gap, and forms a terminal rust-inhibiting film.

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Patent Owner(s)

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

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sugawara, Masato Yokohama, JP 15 159
Tange, Akira Yokohama, JP 181 2214
Wakabayashi, Yutaka Franklin, US 10 256

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