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. 21, 1991
Filed:
May. 17, 1989
Applicant:
Inventor:
Ichiro Yoshimura, Yokohama, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B / ; F27D / ;
U.S. Cl.
CPC ...
65 13 ; 6537413 ; 6537415 ; 165135 ; 373137 ; 432247 ;
Abstract
A furnace comprising a cylindrical heater and a cylindrical insulation around the heater, wherein the insulation has anisotropy in heat transfer and a direction along which the thermal conductivity of the insulation is small corresponds to a direction along which temperature gradient within the insulation is steep. The insulation is formed of plural anisotropic parts arranged such that the direction along which thermal conductivity is low of one part blocks heat transfer from a direction along which the thermal conductivity of another part is high.