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:
Oct. 19, 1993
Filed:
Sep. 11, 1992
Hirohide Yamada, Saitama, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A permanent magnet assembly for false tooth stabilization which includes a cup-shaped case formed of a corrosion resistant and magnetic material, an axially magnetized permanent magnet stored in the case, and a seal plate formed of a corrosion resistant material and fitted into and fixed to an end opening in the case to hermetically seal the case, the seal plate being composed of a central seal plate portion formed of a magnetic material to face the end face of the permanent magnet and a seal edge portion formed of a non-magnetic material to face in the region of the outer periphery of the permanent magnet. The width dimension of the seal edge portion is in the range of 0.03 to 0.07 mm, and at least the abutting portions of the case and seal plate are welded to each other.