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:
Dec. 15, 2015
Filed:
Mar. 27, 2012
Nobukazu Ikoma, Aichi, JP;
Nobukazu Ikoma, Aichi, JP;
NGK INSULATORS, LTD., Nagoya, JP;
Abstract
In resistance welding, an end portion and a flange portion are welded together at contact surfaces thereof by applying a voltage between a first electrode and a second electrode while an inner casing and a main metal piece are pressed in directions toward each other. When a shearing stress due to the pressure is applied to a ceramic guide pin, the guide pin is more resistant to wear compared to a phenolic resin guide pin. In addition, a clearance is between a large-diameter portion of the guide pin and an inner surface of a guide-pin insertion hole. Accordingly, the guide pin is capable of tilting in the radial direction, so that the guide pin can tilt so as to partially absorb the shearing stress. Therefore, the guide pin is more resistant to breakage compared to a guide pin made of ceramic that is not capable of tilting.