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:
Feb. 25, 1992
Filed:
Nov. 25, 1987
Osamu Kyo, Handa, JP;
Yasuo Akitsu, Handa, JP;
NKG Insulators, Ltd., , JP;
Abstract
A magnetic-drive device used for rotary machines, having a high torque transmitting efficiency, causing little temperature elevation of treated fluids and exhibiting mechanical strength and thermal shock resistance. The device comprises a chamber formed by combining a front casing with a rear casing to accommodate a rotor supporting a driven magnet. The rear casing consists of a cylindrical partition walled up at its one end with a bottom portion and provided with a flange portion on the other end, which partition having a thickness of 1.5-8 mm and consisting of a ceramic material having a specific resistance of at least 10.sup.7 .OMEGA.-cm. A driving magnet arranged outside the partition is magnetically coupled with the driven magnet through the partition.