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:
Nov. 16, 2021
Filed:
Nov. 09, 2016
Applicant:
Eagleburgmann Japan Co., Ltd., Tokyo, JP;
Inventor:
Kazuhiko Sato, Tokyo, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J 15/43 (2006.01);
U.S. Cl.
CPC ...
F16J 15/43 (2013.01);
Abstract
A magnetic fluid seal includes an outer cylinder member that houses therein a rotating shaft extending from a housing of a fluid machine, magnetic pole members housed in the outer cylinder member, disposed around the rotating shaft and forming a magnetic circuit, and sealing films to be formed from magnetic fluids, in an axial direction, in magnetic connection with the magnetic circuit, and between the magnetic pole members and the rotating shaft. The magnetic fluid seal further includes a gas supply passage that allows a gas to flow from an outside toward the magnetic pole members.