Lubrication – Systems – Gas turbine
Reexamination Certificate
2011-03-15
2011-03-15
Collins, Timothy D (Department: 3644)
Lubrication
Systems
Gas turbine
C184S055100
Reexamination Certificate
active
07905325
ABSTRACT:
A pumped oil delivery system for delivering oil to moving parts of an aircraft jet engine includes a scoop delivery pump and an accumulator oil reservoir to maintain oil feed to the pump at all times. The system includes a first line to feed oil from the scoop pump to the oil reservoir, a second line to return oil from the oil reservoir to the scoop pump, and pressurized air for pressurizing the oil within the oil reservoir so as to maintain a continuous feed of oil to the pump. The system includes further lines for delivering oil from the scoop pump to the moving parts and for returning oil from the moving parts to the scoop pump. Moving parts include a self scavenging gear box utilizing the centrifugal pumping action of its gears to return oil to the scoop pump, and self scavenging bearing chambers using centrifugal effects of their rotating parts also to return oil to the scoop pump.
REFERENCES:
patent: 4157744 (1979-06-01), Capriotti
patent: 4648485 (1987-03-01), Kovaleski
patent: 1398456 (1975-06-01), None
patent: 1497624 (1978-01-01), None
patent: 2042649 (1980-09-01), None
patent: 2084266 (1982-04-01), None
patent: 2204642 (1988-11-01), None
Coleman Robin M
Rumbelow John A
Wedlake Norman J
Wright Christopher
Collins Timothy D
Oliff & Berridg,e PLC
Rolls-Royce plc
Sanderson Joseph W
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