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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 4653460 B1

PDFFull Text
Date of Patent:
Mar. 31, 1987

Filed:

Jul. 19, 1985

Ignition system for internal combustion engines

Applicant:
Inventors:

Shinji Ooyabu, Obu, JP;

Kazuo Suzuki, Okazaki, JP;

Masahiro Kondo, Toyohashi, JP;

Hirotoshi Nakamura, Kariya, JP;

Assignee:

Nippondenso Co., Ltd., Kariya, JP;

Attorney:

Cushman, Darby & Cushman

Primary Examiner:

Andrew M Dolinar

Int. Cl.
CPC ...
F02P / ;
U.S. Cl.
CPC ...
123645 ; 123643 ; 123655 ;
Abstract

In an ignition system for an internal combustion engine which is operable in synchronism with rotation of the engine to switch on and off a primary current in an ignition coil and applies to a spark plug a high voltage induced in the ignition coil secondary winding upon the off switching, a Zener diode is connected to the low-voltage side of the ignition coil secondary winding in order to prevent a secondary voltage induced upon the on switching of the primary current from being applied to the spark plug.

Find Patent Forward Citations

Ooyabu, Shinji. (1987). Ignition system for internal combustion engines (U.S. Patent No. 4653460). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4653460

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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