by means of a liquid or solid coolant

Industry

CPC
F01L3/14

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Parent Industries

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F01Engines F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES F01L3/00Lift-valve

Current Industry

F01L3/14by means of a liquid or solid coolant

Industries

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Patents Grantslast 30 patents

Information Patent Grant
Method and device for manufacturing hollow, internally cooled valves
- Patent number 11,898,473
- Issue date Feb 13, 2024
- Federal-Mogul Valvetrain GmbH
- Thorsten Matthias
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Internal combustion engine with at least one hollow-head valve
- Patent number 11,828,207
- Issue date Nov 28, 2023
- Mahle International GmbH
- Heiko Heckendorn
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Method for producing a hollow valve with an optimised interior stem...
- Patent number 11,732,622
- Issue date Aug 22, 2023
- Federal-Mogul Valvetrain GmbH
- Thorsten Matthais
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Method for producing a hollow valve for internal combustion engines
- Patent number 11,654,471
- Issue date May 23, 2023
- Federal-Mogul Valvetrain GmbH
- Thorsten Matthias
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Valve for internal combustion engines having a coating
- Patent number 11,525,376
- Issue date Dec 13, 2022
- Federal-Mogul Valvetrain GmbH
- Carsten Strubbe
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Valve for internal combustion engines having a guide vane for coolant
- Patent number 11,441,454
- Issue date Sep 13, 2022
- Federal-Mogul Valvetrain GmbH
- Dirk Schober
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Cavity valve with optimized shaft interior geometry, and method for...
- Patent number 11,313,257
- Issue date Apr 26, 2022
- Federal-Mogul Valvetrain GmbH
- Thorsten Matthias
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Internally cooled valve having a valve bottom, and method for the p...
- Patent number 11,311,964
- Issue date Apr 26, 2022
- Federal-Mogul Valvetrain GmbH
- Guido Bayard
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Hollow exhaust poppet valve
- Patent number 11,300,018
- Issue date Apr 12, 2022
- NITTAN VALVE CO., LTD.
- Koji Kunitake
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Internally cooled valve with inertial pump
- Patent number 11,286,819
- Issue date Mar 29, 2022
- Federal-Mogul Valvetrain GmbH
- Andre Mareau
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Method for producing a hollow valve
- Patent number 11,247,284
- Issue date Feb 15, 2022
- Mahle International GmbH
- Peter Kroos
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Hollow engine valve and manufacturing method therefor
- Patent number 11,215,091
- Issue date Jan 4, 2022
- FUJI HOLLOW VALVE INC.
- Hirokazu Morii
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Cylinder head and engine
- Patent number 11,143,063
- Issue date Oct 12, 2021
- NITTAN VALVE CO., LTD.
- Tai Hwan Lee
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Inside-cooled disc valve and a semi-finished product and method for...
- Patent number 11,035,261
- Issue date Jun 15, 2021
- Federal-Mogul Valvetrain GmbH
- Andre Mareau
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Enhanced oiling for sliding valve aspiration system
- Patent number 10,941,679
- Issue date Mar 9, 2021
- Grace Capital Partners LLC
- Gary W. Cotton
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Poppet valve for an internal combustion engine
- Patent number 10,760,455
- Issue date Sep 1, 2020
- Caterpillar Inc.
- Mark D. Veliz
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Method for filling with metallic sodium
- Patent number 10,710,153
- Issue date Jul 14, 2020
- Nittan Valve Co., Ltd.
- Shigeru Uchida
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method and device for manufacturing metallic-sodium-filled engine v...
- Patent number 10,677,110
- Issue date Jun 9, 2020
- FUJI HOLLOW VALVE INC.
- Takahiro Karita
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Sliding mechanism
- Patent number 10,590,812
- Issue date Mar 17, 2020
- Nissan Motor Co., Ltd.
- Yoshinori Izawa
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Hollow engine valve and manufacturing method therefor
- Patent number 10,526,933
- Issue date Jan 7, 2020
- FUJI HOLLOW VALVE INC.
- Hirokazu Morii
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Method for purifying metallic sodium
- Patent number 10,316,390
- Issue date Jun 11, 2019
- Nittan Valve Co., Ltd.
- Shigeru Uchida
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Assembly of internal combustion engine valve and valve seat
- Patent number 10,287,933
- Issue date May 14, 2019
- Nippon Piston Ring Co., Ltd.
- Satoshi Ikemi
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Precision forming method of high-efficiency and near-net hollow val...
- Patent number 10,279,440
- Issue date May 7, 2019
- HUAIJI DENGYUN AUTO-PARTS (HOLDING) CO., LTD.
- Jinping Liu
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Highly-viscous substance dispensing method and highly-viscous subst...
- Patent number 10,252,307
- Issue date Apr 9, 2019
- Nittan Valve Co., Ltd.
- Koichi Homma
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method for the ultrasonic measurement of a wall thickness in hollow...
- Patent number 10,139,222
- Issue date Nov 27, 2018
- Mahle International GmbH
- Peter Kroos
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Hollow poppet valve
- Patent number 9,920,663
- Issue date Mar 20, 2018
- Nittan Valve Co., Ltd.
- Osamu Tsuneishi
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Intake valve for engine
- Patent number 9,896,978
- Issue date Feb 20, 2018
- Hyundai Motor Company
- Seungwoo Lee
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Method for supplying inert gas into poppet valve intermediate and a...
- Patent number 9,840,948
- Issue date Dec 12, 2017
- Nittan Valve Co., Ltd.
- Hisanaga Yokoyama
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Device for producing at least one hollow valve
- Patent number 9,828,892
- Issue date Nov 28, 2017
- Mahle International GmbH
- Peter Kroos
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Hollow poppet valve
- Patent number 9,790,822
- Issue date Oct 17, 2017
- Nittan Valve Co., Ltd.
- Osamu Tsuneishi
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
VALUE FOR AN INTERNAL COMBUSTION ENGINE AND PRODUCTION METHOD
- Publication number 20240240577
- Publication date Jul 18, 2024
- MAHLE International GmbH
- Peter Kroos
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
HYDROGEN COMBUSTION ENGINE AND PASSENGER CAR AND COMMERCIAL VEHICLE
- Publication number 20240229687
- Publication date Jul 11, 2024
- MAHLE International GmbH
- Christoph Luven
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHOD AND DEVICE FOR MANUFACTURING HOLLOW, INTERNALLY COOLED VALVES
- Publication number 20220403761
- Publication date Dec 22, 2022
- FEDERAL-MOGUL VALVETRAIN GMBH
- THORSTEN MATTHIAS
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
CYLINDER HEAD AND ENGINE
- Publication number 20210285345
- Publication date Sep 16, 2021
- NITTAN VALVE CO., LTD.
- Tai Hwan LEE
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHOD FOR PRODUCING A HOLLOW VALVE WITH AN OPTIMISED INTERIOR STEM...
- Publication number 20210199029
- Publication date Jul 1, 2021
- FEDERAL-MOGUL VALVETRAIN GMBH
- THORSTEN MATTHAIS
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
INTERNALLY COOLED VALVE HAVING A VALVE BOTTOM, AND METHOD FOR THE P...
- Publication number 20210086292
- Publication date Mar 25, 2021
- FEDERAL-MOGUL VALVETRAIN GMBH
- GUIDO BAYARD
- B22 - CASTING POWDER METALLURGY
Information Patent Application
INTERNALLY COOLED VALVE WITH INERTIAL PUMP
- Publication number 20210025297
- Publication date Jan 28, 2021
- FEDERAL-MOGUL VALVETRAIN GMBH
- ANDRE MAREAU
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
Hollow Exhaust Poppet Valve
- Publication number 20210003044
- Publication date Jan 7, 2021
- NITTAN VALVE CO., LTD.
- Koji KUNITAKE
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
VALVE FOR INTERNAL COMBUSTION ENGINES HAVING A COATING
- Publication number 20200318504
- Publication date Oct 8, 2020
- FEDERAL-MOGUL VALVETRAIN GMBH
- CARSTEN STRUBBE
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
INTERNAL COMBUSTION ENGINE WITH AT LEAST ONE HOLLOW-HEAD VALVE
- Publication number 20200232354
- Publication date Jul 23, 2020
- MAHLE International GmbH
- Heiko Heckendorn
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
CAVITY VALVE WITH OPTIMIZED SHAFT INTERIOR GEOMETRY, AND METHOD FOR...
- Publication number 20200173318
- Publication date Jun 4, 2020
- FEDERAL-MOGUL VALVETRAIN GMBH
- THORSTEN MATTHIAS
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
PROCESS FOR MANUFACTURNIG AN INTERNALLY COOLED VALVE HAVING A COOLI...
- Publication number 20200149442
- Publication date May 14, 2020
- FEDERAL-MOGUL VALVETRAIN GMBH
- THORSTEN MATTHIAS
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
HOLLOW ENGINE VALVE AND MANUFACTURING METHOD THEREFOR
- Publication number 20200095907
- Publication date Mar 26, 2020
- FUJI HOLLOW VALVE INC.
- Hirokazu MORII
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
Side Draft, Slide Valve Aspiration
- Publication number 20190345851
- Publication date Nov 14, 2019
- Grace Capital Partners, LLC
- Gary W. Cotton
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
INSIDE-COOLED DISC VALVE AND A SEMI-FINISHED PRODUCT AND METHOD FOR...
- Publication number 20190338682
- Publication date Nov 7, 2019
- FEDERAL-MOGUL VALVETRAIN GMBH
- ANDRE MAREAU
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHOD FOR FILLING WITH METALLIC SODIUM
- Publication number 20190030595
- Publication date Jan 31, 2019
- NITTAN VALVE CO., LTD.
- Shigeru UCHIDA
- B22 - CASTING POWDER METALLURGY
Information Patent Application
COOLED VALVE FOR INTERNAL COMBUSTION ENGINES HAVING A LOAD RELIEF G...
- Publication number 20180347414
- Publication date Dec 6, 2018
- FEDERAL-MOGUL VALVETRAIN GMBH
- STEFAN KELLERMANN
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
INTERNALLY COOLED VALVE FOR INTERNAL COMBUSTION ENGINES, AS WELL AS...
- Publication number 20180304344
- Publication date Oct 25, 2018
- FEDERAL-MOGUL VALVETRAIN GMBH
- STEFAN KELLERMANN
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHOD AND DEVICE FOR MANUFACTURING METALLIC-SODIUM-FILLED ENGINE V...
- Publication number 20180298793
- Publication date Oct 18, 2018
- FUJI HOLLOW VALVE INC.
- Takahiro KARITA
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
VALVE FOR INTERNAL COMBUSTION ENGINES HAVING A GUIDE VANE FOR COOLANT
- Publication number 20180274401
- Publication date Sep 27, 2018
- FEDERAL-MOGUL VALVETRAIN GMBH
- DIRK SCHOBER
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
HIGHLY-VISCOUS SUBSTANCE DISPENSING METHOD AND HIGHLY-VISCOUS SUBST...
- Publication number 20180264530
- Publication date Sep 20, 2018
- NITTAN VALVE CO., LTD.
- Koichi HOMMA
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
POPPET VALVE FOR AN INTERNAL COMBUSTION ENGINE
- Publication number 20180171837
- Publication date Jun 21, 2018
- Caterpillar Inc.
- Mark D. Veliz
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHOD FOR SUPPLYING INERT GAS INTO POPPET VALVE INTERMEDIATE AND A...
- Publication number 20170276031
- Publication date Sep 28, 2017
- NITTAN VALVE CO., LTD.
- Hisanaga YOKOYAMA
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
METALLIC HOLLOW VALVE FOR AN INTERNAL COMBUSTION ENGINE OF A UTILIT...
- Publication number 20170204752
- Publication date Jul 20, 2017
- MAHLE International GmbH
- Peter Kroos
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
HOLLOW POPPET VALVE
- Publication number 20160356186
- Publication date Dec 8, 2016
- NITTAN VALVE CO., LTD.
- Osamu Tsuneishi
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
SLIDING MECHANISM
- Publication number 20160348545
- Publication date Dec 1, 2016
- Nissan Motor Co., Ltd.
- Yoshinori IZAWA
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
ASSEMBLY OF INTERNAL COMBUSTION ENGINE VALVE AND VALVE SEAT
- Publication number 20160326919
- Publication date Nov 10, 2016
- NIPPON PISTON RING CO., LTD.
- Satoshi IKEMI
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
METHOD OF CHARGING A HOLLOW VALVE WITH METALLIC SODIUM AND AN APPAR...
- Publication number 20160279746
- Publication date Sep 29, 2016
- FUJI OOZX INC.
- Takashi MISHIMA
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
METHOD OF MANUFACTURING A HOLLOW POPPET VALVE
- Publication number 20160256965
- Publication date Sep 8, 2016
- NITTAN VALVE CO., LTD.
- Kazuhiro Ishii
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
SYSTEM AND METHOD OF COOLING VALVE WITH MATERIAL IN CAVITY
- Publication number 20160169062
- Publication date Jun 16, 2016
- GENERAL ELECTRIC COMPANY
- Julian Richard Knudsen
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES

by means of a liquid or solid coolant

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Method and device for manufacturing hollow, internally cooled valves

Internal combustion engine with at least one hollow-head valve

Method for producing a hollow valve with an optimised interior stem...

Method for producing a hollow valve for internal combustion engines

Valve for internal combustion engines having a coating

Valve for internal combustion engines having a guide vane for coolant

Cavity valve with optimized shaft interior geometry, and method for...

Internally cooled valve having a valve bottom, and method for the p...

Hollow exhaust poppet valve

Internally cooled valve with inertial pump

Method for producing a hollow valve

Hollow engine valve and manufacturing method therefor

Cylinder head and engine

Inside-cooled disc valve and a semi-finished product and method for...

Enhanced oiling for sliding valve aspiration system

Poppet valve for an internal combustion engine

Method for filling with metallic sodium

Method and device for manufacturing metallic-sodium-filled engine v...

Sliding mechanism

Hollow engine valve and manufacturing method therefor

Method for purifying metallic sodium

Assembly of internal combustion engine valve and valve seat

Precision forming method of high-efficiency and near-net hollow val...

Highly-viscous substance dispensing method and highly-viscous subst...

Method for the ultrasonic measurement of a wall thickness in hollow...

Hollow poppet valve

Intake valve for engine

Method for supplying inert gas into poppet valve intermediate and a...

Device for producing at least one hollow valve

Hollow poppet valve

Patents Applicationslast 30 patents

VALUE FOR AN INTERNAL COMBUSTION ENGINE AND PRODUCTION METHOD

HYDROGEN COMBUSTION ENGINE AND PASSENGER CAR AND COMMERCIAL VEHICLE

METHOD AND DEVICE FOR MANUFACTURING HOLLOW, INTERNALLY COOLED VALVES

CYLINDER HEAD AND ENGINE

METHOD FOR PRODUCING A HOLLOW VALVE WITH AN OPTIMISED INTERIOR STEM...

INTERNALLY COOLED VALVE HAVING A VALVE BOTTOM, AND METHOD FOR THE P...

INTERNALLY COOLED VALVE WITH INERTIAL PUMP

Hollow Exhaust Poppet Valve

VALVE FOR INTERNAL COMBUSTION ENGINES HAVING A COATING

INTERNAL COMBUSTION ENGINE WITH AT LEAST ONE HOLLOW-HEAD VALVE

CAVITY VALVE WITH OPTIMIZED SHAFT INTERIOR GEOMETRY, AND METHOD FOR...

PROCESS FOR MANUFACTURNIG AN INTERNALLY COOLED VALVE HAVING A COOLI...

HOLLOW ENGINE VALVE AND MANUFACTURING METHOD THEREFOR

Side Draft, Slide Valve Aspiration

INSIDE-COOLED DISC VALVE AND A SEMI-FINISHED PRODUCT AND METHOD FOR...

METHOD FOR FILLING WITH METALLIC SODIUM

COOLED VALVE FOR INTERNAL COMBUSTION ENGINES HAVING A LOAD RELIEF G...

INTERNALLY COOLED VALVE FOR INTERNAL COMBUSTION ENGINES, AS WELL AS...

METHOD AND DEVICE FOR MANUFACTURING METALLIC-SODIUM-FILLED ENGINE V...

VALVE FOR INTERNAL COMBUSTION ENGINES HAVING A GUIDE VANE FOR COOLANT

HIGHLY-VISCOUS SUBSTANCE DISPENSING METHOD AND HIGHLY-VISCOUS SUBST...

POPPET VALVE FOR AN INTERNAL COMBUSTION ENGINE

METHOD FOR SUPPLYING INERT GAS INTO POPPET VALVE INTERMEDIATE AND A...

METALLIC HOLLOW VALVE FOR AN INTERNAL COMBUSTION ENGINE OF A UTILIT...

HOLLOW POPPET VALVE

SLIDING MECHANISM

ASSEMBLY OF INTERNAL COMBUSTION ENGINE VALVE AND VALVE SEAT

METHOD OF CHARGING A HOLLOW VALVE WITH METALLIC SODIUM AND AN APPAR...

METHOD OF MANUFACTURING A HOLLOW POPPET VALVE

SYSTEM AND METHOD OF COOLING VALVE WITH MATERIAL IN CAVITY