United Technologies Corporation

Richard M Slayton

Louis J Dobek

James G Snyder

Paul F Brown, Jr

Robert J Makowski, Deceased

William E Fuller

A method and system (10) for rerouting the pressurized oil flow of an engine (not shown) from a primary filter (14) to a secondary filter (18) in the event of a first sensed pressure differential across the primary filter (14) which exceeds an allowable pressure differential, the excessive differential indicative of a primary filter (14) obstruction. In the event of a subsequent second sensed pressure differential which exceeds a second and higher pressure differential across the secondary filter (18), the oil flow is then diverted through a pump relief valve (19) toward the oil reservoir (26), away from an engine bearing compartment (50). The system (10) also provides sequenced first and second level warnings (40, 42) to the controller/flight crew, said warnings responsive to the operating status of the system (10).

Oil filtration system and method

For a rotating carbon seal that requires lubrication a rotating self-actuating weepage valve responding to speed and/or pressure for closure of the valve at a given operating condition.

Anti-weepage valve for rotating seals

The inner ring of a high speed roller bearing is constructed in three pieces, an inner race sandwiched between side rails. The inner race being the major load carrying member is fabricated from a high strength steel and the side rail elements are constructed from a more ductile steel. All the lubrication and oil cooling passages are judiciously located in the ductile steel constructed side rails. Scoops are provided in proximity to the side rails to aid in the delivering of oil to the lubrication and oil cooling passages.

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South Windsor, CT, United States of America

Richard M Slayton