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:
Jan. 30, 1996
Filed:
Nov. 09, 1993
Shigeru Maruyama, Saitama, JP;
Yuichi Shimasaki, Saitama, JP;
Masaki Kanehiro, Saitama, JP;
Takashi Hisaki, Saitama, JP;
Shigeki Baba, Saitama, JP;
Takuji Ishioka, Saitama, JP;
Jiro Takagi, Saitama, JP;
Eitetsu Akiyama, Saitama, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A spark plug cap covering the terminal of a spark plug for an internal combustion engine, made up of an insulative cap body, an ignition coil unit case housing the coil and having a terminal for the ignition coil, a first conductive shaft housed in the insulative cap body for carrying an ignition voltage produced by the ignition coil to the spark plug terminal, and a second conductor located around the first conductor keeping a predetermined distance therefrom separated by the insulative material of the cap body such that a capacitor is formed between the first and second conductors for detecting the ignition voltage. The cap is further provided with a first contact in the form of an annulus provided at the end of said insulative cap body and electrically connected with said second conductor, and a second contact in the shape of a leaf spring electrically connected with the terminal of said case, such that the second contact is brought into contact with the first contact when said case is threaded into said insulative cap body, thereby ensuring electrical connection therebetween.