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:
Aug. 17, 2004
Filed:
Oct. 09, 2002
Tsukasa Maenosono, Kawasaki, JP;
DAI-ICHI High Frequency Co., Ltd., Tokyo, JP;
Abstract
There is provided an inductor for heating the inner circumference of a hole, by which induction heating of the inner circumference of a hole and so on can be realized rapidly and uniformly in the direction of the circumference, and there is no risk of a short-circuit between a solenoidal coil and transition conductor passing therethrough. According to a configuration in which a magnetic core with a cylindrical shape is arranged inside of a solenoidal coil which forms the inductor , and a transition conductor extending from one end of the solenoidal coil to a feeding terminal through the inside of the solenoidal coil is arranged in an inserted manner into a hollow portion of the magnetic core , a risk of the short circuit is avoided by using an insulating material for the magnetic core , assuming that the magnetic core with a large cross-sectional area is concentrically arranged in the solenoidal coil