Thomas Alan Kane

US Patent:

6918746, Jul 19, 2005

Filed:

Apr 25, 2003

Appl. No.:

10/423313

Inventors:

Werner C. Duerr - Westchester IL, US
John R. Zagone - Westmont IL, US
Thomas J. Kane - Naperville IL, US
Randal K. Albright - Montgomery IL, US

Assignee:

Electro-Motive Diesel, Inc. - LaGrange IL

International Classification:

F01D001/02

US Classification:

415206, 415229

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.

US Patent:

6929449, Aug 16, 2005

Filed:

Apr 25, 2003

Appl. No.:

10/423361

Inventors:

John R. Zagone - Westmont IL, US
Werner C. Duerr - Westchester IL, US
Thomas J. Kane - Naperville IL, US
Randal K. Albright - Montgomery IL, US

Assignee:

Electro-Motive Diesel, Inc. - LaGrange IL

International Classification:

F01D001/02

US Classification:

415206, 415110, 415229

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.