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:
Jun. 05, 1990
Filed:
Sep. 06, 1988
Applicant:
Inventor:
Charles D Oakley, Lapeer, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01T / ; H01T / ;
U.S. Cl.
CPC ...
313141 ; 313143 ; 313144 ; 445-7 ;
Abstract
A metal spark plug shell includes an L-shaped copper core side electrode secured in an axially extending slot on the metal shell. The side electrode includes an attachment end having a portion with an outer side that is threaded contiguous with the metal shell and another portion adjacent the end of the metal shell with a recessed outer side that is unthreaded so as to permit spark plug gapping without breakage of the side electrode. The heat-resistant sheath around the copper core on the inner side of the attachment end may be spot welded to the metal shell.