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:
Mar. 29, 2005
Filed:
Mar. 31, 2003
Hiromi Hiramatsu, Kariya, JP;
Masamichi Shibata, Toyota, JP;
Hirofumi Suzuki, Kuwana, JP;
Tetsuya Miwa, Nagoya, JP;
Hiromi Hiramatsu, Kariya, JP;
Masamichi Shibata, Toyota, JP;
Hirofumi Suzuki, Kuwana, JP;
Tetsuya Miwa, Nagoya, JP;
Denso Corporation, Kariya, JP;
Abstract
In an ignition device for an internal combustion engine which is mounted in a cylinder head in a state where a spark plug and an ignition coil are integrated with each other, the plug side tube section is made of ceramics and internally accommodates a center electrode and the coil side tube section is made of ceramics, with one of a primary winding and a secondary winding being wound around the coil side tube section. The plug side tube section and the coil side tube section are constructed as separate bodies and then combined with each other. This shortens the overall lengths of both the tube sections, thus preventing the occurrence of cracks or bends at calcining and improving the dimension accuracy after the calcining.