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. 03, 1986
Filed:
Jul. 13, 1984
Frank T Walton, Shelbyville, IN (US);
Wellman Thermal Systems Corporation, Shelbyville, IN (US);
Abstract
A method of making a glow plug includes the steps of swaging a sheath of a heater having an internal heating coil therein and a compressible washer at the open end of the sheath to reduce the sheath's diameter and to force some of the washer out of the sheath to leave a washer portion of a diameter larger than the swaged sheath diameter. The heater is force fitted into a housing with the external washer being press fitted against an internal bore wall of the housing to form an air-tight seal with the bore wall. This eliminates the usual brazing step of brazing the sheath to the housing to seal against flow of combustion gases therebetween.