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:
May. 20, 1986
Filed:
Apr. 11, 1983
Applicant:
Inventors:
Isao Sugihara, Hitachi, JP;
Tsukasa Ikegami, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219 1043 ; 219-85 ; 219 1057 ; 219 1079 ; 148145 ; 148154 ; 266129 ;
Abstract
The invention relates to a method of heating a piping arrangement and a heating coil used in the heating process by heating pipes through a high frequency wave induction. A spacing between the pipe outer surface and the heating coil is varied in compliance with a change in configuration of the heating coil. According to the invention, even if the coil configuration is particularly changed, it is possible to heat the pipes uniformly to obtain a uniform temperature distribution.