US Patent 7560666 Glow plug and method of producing the same

Patent 7560666 was granted and assigned to Denso on July, 2009 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

Denso

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7560666

Date of Patent

July 14, 2009

Patent Application Number

10988695

Date Filed

November 16, 2004

Patent Primary Examiner

‌

Daniel L. Robinson

Patent abstract

A glow plug includes a sleeve secured by press-fitting to a housing with a ceramic heater held therein. A lead wire exposed from the heater is electrically connected to an inside surface of the sleeve to form a joint portion. The joint portion and a press-fit portion formed between the sleeve and the housing are offset in position relative to each other along an axial direction of the housing. The joint portion is thus kept free from the influence of a load or pressure applied during press-fitting operation to form the press-fit portion. A method of producing such glow plug is also disclosed.