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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.:

US 10291000 B1

PDFFull Text
Date of Patent:
May. 14, 2019

Filed:

Jul. 05, 2016

Ignition apparatus

Applicant:

Denso Corporation, Kariya, Aichi-pref., JP;

Inventors:

Akimitsu Sugiura, Kariya, JP;

Kenji Hattori, Kariya, JP;

Shunichi Takeda, Kariya, JP;

Kaori Doi, Kariya, JP;

Ryota Wakasugi, Kariya, JP;

Assignee:

DENSO CORPORATION, Kariya, JP;

Attorney:

Nixon & Vanderhye P.C.

Primary Examiner:

Thomas Moulis

Int. Cl.
CPC ...
F02P 3/00 (2006.01); H01T 13/00 (2006.01); H01T 15/00 (2006.01); F02P 13/00 (2006.01); F02P 15/00 (2006.01); H01T 13/20 (2006.01); F02P 3/04 (2006.01); H01F 38/12 (2006.01); H01T 13/08 (2006.01); H01T 13/38 (2006.01); H01T 13/04 (2006.01); H01T 13/42 (2006.01); H01T 13/32 (2006.01); F02P 3/02 (2006.01);
U.S. Cl.
CPC ...
H01T 15/00 (2013.01); F02P 3/04 (2013.01); F02P 13/00 (2013.01); F02P 15/00 (2013.01); H01F 38/12 (2013.01); H01T 13/04 (2013.01); H01T 13/08 (2013.01); H01T 13/20 (2013.01); H01T 13/38 (2013.01); H01T 13/42 (2013.01); F02P 3/02 (2013.01); H01T 13/32 (2013.01);
Abstract

An ignition apparatus includes a spark plug and an ignition coil. The spark plug has a plug terminal protruding proximalward from an insulator. The ignition coil includes a coil main body, which includes a primary coil and a secondary coil, and a helical spring that electrically connects the secondary coil and the plug terminal. The plug terminal is made of a material that is both electrically conductive and magnetic. The plug terminal includes a terminal main body, which has an outer diameter greater than an inner diameter of the spring, and a terminal extension portion that has an outer diameter less than the inner diameter of the spring and extends proximalward from the terminal main body. A distal end portion of the spring abuts the terminal main body. The terminal extension portion is inserted and arranged in the spring. Between an outer circumferential surface of the terminal extension portion and an inner circumferential surface of the spring, there is interposed an insulating member.

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