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:
Apr. 10, 2001
Filed:
Feb. 11, 1999
Hironori Osamura, Chiryu, JP;
Denso Corporation, Kariya, JP;
Abstract
A spark plug for an internal combustion engine comprises a noble metallic firing tip laser welded on the opposing surface of either a central electrode or a grounded electrode. A fused junction layer, formed between the noble metallic firing tip and the base electrode member, contains 40˜70 wt % noble metallic firing tip component. The noble metallic firing tip has a non-fused portion axially extending by a length “L”, where 0.2 mm ≦L≦0.7 mm. The fused junction layer axially extends by a length “M”, where 0.2 mm ≦M≦0.7 mm. And, the relationship B≧1.3A is established when “A” represents the diameter of the noble metallic firing tip and “B” represents the diameter of a contact area at the boundary between the fused junction layer and the base electrode member, where 0.3 mm ≦A≦0.6 mm.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile