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:
Feb. 13, 2018
Filed:
Jan. 26, 2017
Federal-mogul Corporation, Southfield, MI (US);
Nathan A. Thomson, Southgate, MI (US);
Kevin J. Kowalski, Cambridge, OH (US);
Jeremy M. Bowman, Livonia, MI (US);
Federal-Mogul LLC, Southfield, MI (US);
Abstract
A method of manufacturing a spark plug () for being threaded into a cylinder head () of an internal combustion engine is provided. The spark plug () includes a shell () with threads () disposed at a predetermined rotational position (a) relative to a shell outer surface () and ground electrode (). The position of the threads () relative to the ground electrode () places the ground electrode () in a desired position in the combustion chamber () and relative to components of the engine, thus allowing the ground electrode () to provide a robust and reliable ignition. When multiple spark plugs () are formed, the threads () in each of the shells () are repeatedly and accurately formed at the predetermined rotational position (α) by locating the ground electrode (), threads (), and dies () of a thread forming apparatus () in specific locations.