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:
Nov. 10, 2015
Filed:
Oct. 19, 2012
Denso Corporation, Kariya, Aichi-pref., JP;
Nobuo Abe, Yokkaichi, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
An assembly includes an engine main body, a spark plug and a gasket. The spark plug is mounted to the engine main body by tightening a male-threaded portion of the spark plug into a female-threaded portion of the engine main body with the gasket elastically deformed between a seat surface of the engine main body and a seating surface of the spark plug. The gasket is made of a metallic material whose yield stress or 0.2% proof stress is not lower than 200 N/mm. The gasket has first and second contact surfaces respectively in contact with the seating surface of the spark plug and the seat surface of the engine main body. The first and second contact surfaces of the gasket are each formed as a part of a curved surface that has a convex shape, and are offset from each other in a radial direction of the spark plug.