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:
Aug. 16, 2005
Filed:
Apr. 25, 2003
John R. Zagone, Westmont, IL (US);
Werner C. Duerr, Westchester, IL (US);
Thomas J. Kane, Naperville, IL (US);
Randal K. Albright, Montgomery, IL (US);
John R. Zagone, Westmont, IL (US);
Werner C. Duerr, Westchester, IL (US);
Thomas J. Kane, Naperville, IL (US);
Randal K. Albright, Montgomery, IL (US);
Electro-Motive Diesel, Inc., LaGrange, IL (US);
Abstract
An improved diesel engine water pump includes three main features that aid in extending the maintenance-free life of the pump. The impeller shaft is carried by tapered roller shaft support bearings of which the impeller bearing has a floating outer race that is urged axially by a preload spring to provide a prescribed axial preload that maintains concentricity of the shaft with the axis and prolongs bearing life. An improved oil seal combines an oil slinger, a stationary deflector and a lip oil seal with a return passage to the engine to more effectively limit oil leakage from the pump. An improved water seal includes pressurized water jets fed from the pump volute that flush wear particles from the water seal surface and increase water seal life. Further details of these features are also disclosed.