John H Hallman

US Patent:

46310096, Dec 23, 1986

Filed:

Jul 18, 1984

Appl. No.:

6/631922

Inventors:

John E. Cygnor - Rockford IL
John Hallman - Rockford IL

Assignee:

Sundstrand Corporation - Rockford IL

International Classification:

F04C 218
F04C 1500

US Classification:

418 15

Abstract:

A lubrication scavenge system for an engine bearing compartment or the like utilizing a gear pump with two or more independent inlets with separate flow paths through the pump. The inlets and flow paths are maintained separate from each other by the use of inlet and discharge seal arcs to avoid any fluid communication therebetween. The pump can operate to pump different fluids through each inlet with the fluid being either a gas or liquid or a mixture of both and with the pump continuing its pumping action when there is an instantaneous interchange in the fluid being pumped at each inlet as can occur when the engine bearing compartment is subjected to varying positive and negative gravity forces.

US Patent:

48446912, Jul 4, 1989

Filed:

Dec 30, 1987

Appl. No.:

7/139384

Inventors:

John H. Hallman - Rockford IL
Theodore C. Powers - Rockford IL
Peter B. Thomas - Rockford IL

Assignee:

Sundstrand Corporation - Rockford IL

International Classification:

F01D 2532

US Classification:

4151691

Abstract:

A centrifugal liquid pump includes an impeller and a hub for the impeller, whereby gases entrained in the liquid are separated from the liquid and collect near the hub by centripetal action. A shaft is connected to the hub for rotating the impeller, and a passageway extends axially through the shaft. A gas entry is provided near the hub in communication with the passageway. An air pump is provided at an opposite end of the shaft for evacuating the separated gases collected near the hub. The air pump is independent of and remote from the impeller and is in communication with the passageway extending axially through the shaft.