- Patent Title: Method for producing a hollow valve for internal combustion engines
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Application No.: US17056482Application Date: 2019-01-31
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Publication No.: US11654471B2Publication Date: 2023-05-23
- Inventor: Thorsten Matthias , Antonius Wolking , Guido Bayard
- Applicant: FEDERAL-MOGUL VALVETRAIN GMBH
- Applicant Address: DE Barsinghausen
- Assignee: Federal-Mogul Valvetrain GmbH
- Current Assignee: Federal-Mogul Valvetrain GmbH
- Current Assignee Address: DE Barsinghausen
- Agency: Dickinson Wright, PLLC
- Agent Robert L. Stearns
- Priority: DE 2018112291.8 2018.05.23
- International Application: PCT/EP2019/052372 2019.01.31
- International Announcement: WO2019/223908A 2019.11.28
- Date entered country: 2020-11-18
- Main IPC: B21D22/16
- IPC: B21D22/16 ; B21K1/22 ; F01L3/14 ; F01L3/20 ; F16K1/36 ; F16K49/00
Abstract:
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.
Public/Granted literature
- US20210370376A1 METHOD FOR PRODUCING A HOLLOW VALVE FOR INTERNAL COMBUSTION ENGINES Public/Granted day:2021-12-02
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