Hollow engine valve and manufacturing method therefor

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11215091
APP PUB NO 20200095907A1
SERIAL NO

16696113

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Importance

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Abstract

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A manufacturing method for a hollow engine valve comprises: a step of forming, by forging, a solid round bar as a material of a valve main body into a valve main body intermediate member provided with a semifinished product valve head portion corresponding to a valve head portion and a solid stem portion corresponding to a valve stem portion; a step of performing cutting process with respect to the valve main body intermediate member across the solid stem portion and the semifinished product valve head portion for forming a semifinished product hollow hole with a bottom corresponding to a hollow hole; and a step of performing necking process with respect to the valve main body semifinished product for squeezing the semifinished product valve stem portion step by step, to form the valve main body semifinished product into the valve main body.

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Patent Owner(s)

Patent OwnerAddress
FUJI OOZX INC1500-60 MISAWA KIKUGAWA-SHI SHIZUOKA 4390023

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hirao, Kenichiro Tokyo, JP 6 57
Morii, Hirokazu Tokyo, JP 20 133
Nishio, Hidenobu Tokyo, JP 2 8

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