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:
Sep. 29, 2020
Filed:
Jan. 21, 2020
Denso Corporation, Kariya, Aichi-pref., JP;
Kazuhide Kawai, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
An outer periphery of the tubular housing includes a parallel surface, a pressure contact surface and a connection surface. The parallel surface is formed parallel to an axial direction of the spark plug. The pressure contact surface is located closer to a tip of the spark plug and more radially inward than the parallel surface. The pressure contact surface has a tapered shape in that a diameter decreases toward the tip. The pressure contact surface is pressed against a cylinder head when installed in the internal combustion engine. The connection surface is located closer to a base of the spark plug than an extension line in a longitudinal cross-section of the spark plug parallel to the axial direction including a plug central axis. The connection surface connects an outer peripheral end of the pressure contact surface with a longitudinal end of the parallel surface.