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. 24, 2006
Filed:
Feb. 12, 2004
James M. Leclair, Jr., Shakopee, MN (US);
Jarett D. Millar, Minneapolis, MN (US);
Andrew T. Miller, Eagan, MN (US);
James M. LeClair, Jr., Shakopee, MN (US);
Jarett D. Millar, Minneapolis, MN (US);
Andrew T. Miller, Eagan, MN (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A rotary fluid pressure device () having a housing (), inlet and outlet ports (), a gerotor gear set (), a valve member () and an input-output shaft (). A seal assembly () is disposed radially between the shaft () and the housing (). The seal assembly comprises, in the order of leakage flow from a case drain region (), a high pressure shaft seal (), an annular chamber () in which is disposed a rigid back-up member () for the seal (), a drain passage () communicating from the annular chamber () to a case drain port (), and a low pressure shaft seal (). The back-up member () may cooperate with either the housing () or the seal () or the input-output shaft () to define a fluid passage (), so that any leakage flow past the high pressure shaft seal () flows through the drain.