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:
Oct. 24, 1995
Filed:
Jun. 24, 1994
Applicant:
Inventors:
Wataru Matsutani, Nagoya, JP;
Junichi Kagawa, Nagoya, JP;
Assignee:
NGK Spark Plug Co., Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ; H01T / ;
U.S. Cl.
CPC ...
21912164 ; 445-7 ;
Abstract
A method of manufacturing a spark plug electrode, wherein a composite column is provided to have a heat-conductor core embedded in a metallic clad by means of extrusion. A firing tip is provided from a slug which is made of a noble metal. The slug is concentrically placed on an end surface of the metallic clad, and a laser beam welding is applied on the slug to thermally melt the entire the slug so that the end surface of the metallic clad is partly fused into the slug in the range of 0.5 wt % to 80.0 wt %.