The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 2020
Filed:
Jan. 29, 2016
Nittan Valve Co., Ltd., Kanagawa, JP;
Sukegawa Electric Co., Ltd., Ibaraki, JP;
Shigeru Uchida, Kanagawa, JP;
Ryo Onose, Kanagawa, JP;
Koichi Homma, Kanagawa, JP;
Kuniaki Miura, Ibaraki, JP;
Masashige Hanawa, Ibaraki, JP;
NITTAN VALVE CO., LTD., Kanagawa, JP;
SUKEGAWA ELECTRIC CO., LTD., Ibaraki, JP;
Abstract
Provided is a method for filling a stem-side hollow area of an engine valve with metallic sodium. The method includes injecting melted metallic sodium into a cylinder having a larger diameter than an inner diameter of the hollow area of the engine valve, forming a solidified metallic sodium rod having a substantially uniform structure in the cylinder, inserting the metallic sodium into the hollow area of the engine valve through a nozzle having a small diameter, and sealing the engine valve.