Raymond F Fiore

US Patent:

60992433, Aug 8, 2000

Filed:

Jan 29, 1999

Appl. No.:

9/240297

Inventors:

Raymond F. Fiore - Peoria IL

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F04D 2906

US Classification:

415111

Abstract:

A centrifugal pump of the type in which fluid enters radially includes a debris blocking shield over a space around a shaft seal with a channel to supply energized fluid to near the center of the pump impeller. Apertures in the impeller then pass the fluid longitudinally through the impeller and the seal space covered by the shield, with a shield gap for the return of the fluid from the seal space into the main stream.

US Patent:

57137196, Feb 3, 1998

Filed:

Aug 9, 1996

Appl. No.:

8/694977

Inventors:

Raymond F. Fiore - Peoria IL
Kenneth D. Themanson - Kewanee IL

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F04D 100

US Classification:

415 582

Abstract:

A self flushing centrifugal pump has a fluid flushing passageway disposed in a housing of the pump which directs flushing fluid flow from a volute passageway in the housing of the pump near an outlet port of the pump to a chamber in the pump near a pump shaft seal and from the chamber to an inlet port of the pump via apertures in the impeller of the pump in response to rotation of the impeller.