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:
Sep. 25, 2012
Filed:
Aug. 17, 2011
John W. Hoffman, Perrysburg, OH (US);
John W. Hoffman, Perrysburg, OH (US);
Federal-Mogul World Wide, Inc., Southfield, MI (US);
Abstract
A spark plug () includes an intermediate connecting pin () disposed in the central passage () of an the insulator body (). The connecting pin () seats in an intermediate taper section () within the central passage (), which is generally frustoconical and establishes a transition between a first larger diameter of the central passage () and a second smaller diameter. The intermediate tapered section () is located longitudinally above a filleted transition () feature of the insulator body () exterior. A pin head () of the connecting pin () has a complementary tapered under-cut and seats against the intermediate tapered section () to provide self-centering of the connecting pin () without trapping gas during the assembly process. The intermediate taper section () also provides an increase in insulator wall thickness which improves dielectric capacity and structural integrity of the insulator ().