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. 02, 1999
Filed:
Sep. 30, 1997
Applicant:
Inventor:
Walter Helgeland, Quechee, VT (US);
Assignee:
Rigaku/USA, Inc., Danvers, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
F16J / ; F16J / ;
U.S. Cl.
CPC ...
277410 ; 310 905 ;
Abstract
A rotary motion feedthrough for coupling rotary motion from a rotatable shaft between an atmospheric side to a vacuum side includes a dynamic magnetic seal formed of magnets separated by pole rings which rings are formed integral with the shaft to form a magnetic system which rotates with the shaft.