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:
May. 02, 2017
Filed:
Aug. 01, 2014
Imagineering, Inc., Kobe-shi, Hyogo, JP;
Yuji Ikeda, Kobe, JP;
Minoru Makita, Kobe, JP;
IMAGINEERING, INC., Kobe, JP;
Abstract
To provide a spark plug that can reduce power loss and prevent erosion of a tip end part of a central electrode, even in a configuration such that a discharge current and an electromagnetic wave are emitted from a terminal fitting part of the spark plug, and a plasma generation device using the spark plug. The spark plug is provided with a central electrodeincluding a terminal fitting partA and an electrode main bodyB electrically connected to the terminal fitting partA, an insulatorformed with an axial hole, which the central electrodeis fitted into, a main fittingthat surrounds the insulator, and a ground electrodethat extends from an end surface of the main fittingand is adapted to form a discharge gap that causes a spark discharge between the central electrodeand the electrode main bodyB. The electrode main bodyB is constituted of a front electrodeincluding an electrode tip parta for causing the spark discharge with the ground electrode, a front dielectric cylinderin a tube-like shape that covers the electrode tip parta, and a coupling conductive cylinderin a tube-like shape that joins the front dielectric cylinderand the terminal fitting partA.