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:
Nov. 30, 1999
Filed:
Jun. 10, 1998
Applicant:
Inventor:
John Duncan McNair, Hong Kong, HK;
Assignee:
Chiaphua Industries Limited, Shatin, HK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219617 ; 219 67 ; 219536 ; 219603 ; 219635 ; 29611 ;
Abstract
An electric heating element having a central conductor and an outer metallic sheath is welded to a base of vessel to provide a heating container, for hot water in a domestic appliance for example. In order to carry out the welding, the vessel is heated up by an induction heater to a certain temperature and the temperature of the actual contacting welding surfaces raised above the certain temperature to a fusing temperature by applying and controlling electric power supplied to the conductor while the heating element is held firmly in position against the base.