Valve spring retainer for an internal combustion engine and a method of manufacturing the same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8899200
APP PUB NO 20120132841A1
SERIAL NO

13265125

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Abstract

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Oxide film formed on a spring-retaining flange by heat treatment gets unlikely to peel off, thereby improving wear resistance of a contact surface of the spring-retaining flange with a valve spring. The oxide film 15 of the part of the spring-retaining flange 3 with the valve spring 7 is at least partially removed to make thickness of the oxide film to 0.00 to 0.02 μm.

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Patent Owner(s)

Patent OwnerAddress
FUJI OOZX INC1500-60 MISAWA KIKUGAWA-SHI SHIZUOKA 439-0023

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aoki, Takayuki Shizuoka, JP 83 596
Sassa, Takeshi Shizuoka, JP 7 18

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