Steel wire for a spring and method for the production thereof

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United States of America Patent

PATENT NO 4938811
SERIAL NO

07262115

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Abstract

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A steel wire, and a method for producing the same, for use in the manufacture of a chassis or suspension automotive spring having a high sag resistance. In accordance with the invention, after a heat treatment is effected, strain is imposed to the steel wire so as to thereby improve the sag resistance. The strain may be imposed either during tempering or at room temperature following tempering.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
SUMITOMO (SEI) STEEL WIRE CORP1-1 KOYAKITA 1-CHOME ITAMI-SHI HYOGO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Matsushima, Norihisa Hyogo, JP 1 5
Murai, Teruyuki Hyogo, JP 38 309
Ogita, Hideo Hyogo, JP 2 23
Takamuku, Seizo Hyogo, JP 1 5

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