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:
Apr. 07, 2020
Filed:
Jun. 28, 2017
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Tetsuya Otosaka, Gunma, JP;
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
Abstract
A heating furnace includes a bolt inserted through an insertion hole in a part of a heater and further inserted into a hole on a tip surface of an electrode rod. A first washer is between a bearing surface of the bolt and one face of the heater. A second washer is between another face of the heater and the tip surface. The relation of: |L·α−(T·α+T·α+T·α)|·ΔT≤0.15(T+T) is satisfied, where Lis an interval between the bearing surface and the tip surface, αis a linear expansion coefficient (LEC) of the bolt, T, Tand Tare thicknesses of the part, first and second washers and α, αand αare their LECs, respectively, and ΔT is a temperature increment quantity of a part where the heater and the electrode rod are fastened by the bolt.