Method for producing a hollow valve for internal combustion engines

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United States of America Patent

PATENT NO 11654471
APP PUB NO 20210370376A1
SERIAL NO

17056482

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Abstract

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A production method for a valve body of a hollow valve includes providing a preform with a valve head and a tubular wall which surrounds a cylindrical cavity. The tubular wall is flow formed above a flow forming mandrel which is inserted into the cavity in order to increase a length of the tubular wall. A hollow valve produced by flow forming is also disclosed.

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Patent Owner(s)

Patent OwnerAddress
FEDERAL-MOGUL VALVETRAIN GMBH30890 BARSINGHAUSEN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bayard, Guido Dortmund, DE 17 13
Matthias, Thorsten Garbense, DE 13 10
Wolking, Antonius Barsinghausen, DE 17 13

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