B21K 1/22

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Showing 1 to 20 of 45 results

Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
9840948 Method for supplying inert gas into poppet valve intermediate and apparatus for supplying inert gas into poppet valve intermediateOct 28, 15Dec 12, 17NITTAN VALVE CO., LTD.
9790822 Hollow poppet valveFeb 10, 14Oct 17, 17NITTAN VALVE CO., LTD.
9757826 Method of charging a hollow valve with metallic sodiumSep 02, 14Sep 12, 17FUJI HOLLOW VALVE INC.
9751164 Method of manufacturing a hollow poppet valveNov 21, 13Sep 05, 17NITTAN VALVE CO., LTD.
9689506 Hollow poppet valveMar 26, 13Jun 27, 17NITTAN VALVE CO., LTD.
9611953 Hollow poppet valveMar 14, 13Apr 04, 17NITTAN VALVE CO., LTD.
9447711 Method for production of valve head portion of hollow engine valve and hollow engine valveJul 31, 13Sep 20, 16FUJI HOLLOW VALVE INC., Yoshimura Company,
9427795 Method for producing a hollow engine valveJan 21, 13Aug 30, 16FUJI HOLLOW VALVE INC., Yoshimura Company,
9371915 Poppet valve with a formed seat, and method of makingJun 30, 15Jun 21, 16NITTAN VALVE CO., LTD.
9302317 Method for manufacturing hollow engine valveFeb 17, 12Apr 05, 16FUJI HOLLOW VALVE INC., Yoshimura Company,
9283615 Engine valve forging systemDec 27, 11Mar 15, 16NITTAN VALVE CO., LTD.
9194263 Method for production of valve head portion of hollow engine valve and hollow engine valveJul 31, 13Nov 24, 15FUJI HOLLOW VALVE INC., Yoshimura Company,
9175788 Hollow poppet valveOct 02, 12Nov 03, 15NITTAN VALVE CO., LTD.
9163734 Poppet valve with a formed seat, and method of makingMar 13, 14Oct 20, 15NITTAN VALVE CO., LTD.
9085028 Method for manufacturing valve train parts using metal powder injection moldingDec 14, 12Jul 21, 15HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION,
9015940 Method of manufacturing a valve for an internal combustion engineOct 14, 11Apr 28, 15NITTAN VALVE CO., LTD.
8978248 Method of manufacturing a valve for an internal combustion engineOct 14, 11Mar 17, 15NITTAN VALVE CO., LTD.
8881391 Method for producing hollow engine valveSep 24, 10Nov 11, 14MITSUBISHI HEAVY INDUSTRIES, LTD., Yoshimura Company,
8869511 -formation in such an engine and such engineMay 12, 09Oct 28, 14MAN DIESEL & TURBO, FILIAL AF MAN DIESEL & TURBO SE, TYSKLAND
8713793 Method for producing metallic-sodium-filled engine valveSep 09, 10May 06, 14MITSUBISHI HEAVY INDUSTRIES, LTD., Yoshimura Company,

Showing 1 to 20 of 45 results