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:
May. 24, 2011
Filed:
Sep. 21, 2006
Otto Pabst, Bolzano, IT;
Franco Gadrino, Turin, IT;
Michael Kleinlercher, Steinach, AT;
Wilic S.AR.L., Luxembourg, LU;
Abstract
A bearing sealing arrangement for rotating machines uses a radially-acting labyrinth seal () to minimize bearing lubricant leakage and an axially-acting screw-type gasket () to return what fluid escapes through the labyrinth seal to the bearing (). In embodiments, the labyrinth seal uses rings () with plastic wear surfaces formed about internal metal bands, the plastic forming corresponding profiles on the ends () of the bands so that the profiles interlock when overlapped to form the rings. The screw-type gasket preferably includes rotor-mounted helical fillets () formed in a section () that is retained in a seat () on the rotor. The section in embodiments is retained by inserting a ring-shaped key () into the section, thereby forcing the section into undercuts of the seat. The arrangement is particularly useful in wind machines, such as wind-turbines.