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:
Aug. 08, 2017
Filed:
Feb. 21, 2012
Tadashi Watanabe, Komaki, JP;
Yoshihiro Nakamura, Komaki, JP;
Shunsuke Maeda, Toyota, JP;
Masayoshi Matsui, Ichinomiya, JP;
Tadashi Watanabe, Komaki, JP;
Yoshihiro Nakamura, Komaki, JP;
Shunsuke Maeda, Toyota, JP;
Masayoshi Matsui, Ichinomiya, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A glow plug wherein a combustion gas prevention wall () extends radially outward on the outer circumferential surface of heater () such that when the heater () is viewed rearward from its forward end () along the axial direction, the combustion gas prevention wall () closes an annular gap Kat a position forward of annular membrane portion () of seal member (). The combustion gas prevention wall () has an outer diameter Dgreater than the inner diameter Dof forward end () of the housing.