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:
Sep. 09, 2003
Filed:
Nov. 23, 2001
Berthold Schulten, Geretsried, DE;
Werner Wolf, Mammendorf, DE;
Peter Haselbacher, Geretsried, DE;
Thomas Keller, Geretsried, DE;
Burgmann Dichtungswerke GmbH & Co. KG, Wolfratshausen, DE;
Abstract
A face seal device for use with components rotating at a high rotational speed includes a non-rotating face seal ring ( ) and a rotary face seal ring ( ) mounted in a loose fit on and rotatable together with the rotary component. The rotary face seal ring includes a sealing face ( ) which, in operation, is essentially radially aligned for cooperation with an opposite sealing face ( ) of the non-rotating face seal ring. The rotary face seal ring is formed of at least a base portion ( ) and an extension portion ( ). The extension portion provides an additional mass and has an areal center of gravity axially spaced from the areal center of gravity of the base portion An axial spacing z between the areal centers of gravity and the mass m of the extension portion are in specific relationship with each other, whereby in operation a torque directed towards the non-rotating face seal ring is applied to the rotary face seal ring. This torque arises from the centrifugal forces that are a function of the mass of the extension portion and the spacing between the areal centers of gravity.