Oil system for aircraft gas turbine engine

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4531358
SERIAL NO

06305706

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A fully aerobatic oil system for an aircraft gas turbine engine includes two re-circulatory oil systems the pumps for which have inlets 19 and 31a disposed at locations in the engine such that when one inlet is starved of oil, due to the aircraft attitude changing, oil will be supplied to the other one. In a specific embodiment, the breather of the oil system 30 (FIG. 2) is positioned in the engine gearbox and provides the lowest pressure point in the system. The breather is of the type described in UK Pat. No. 1,508,212 which includes a rotating compartment filled with RETIMET (Regd. Trade Mark). The bearing chambers are pressurised with air from the engine and the air/oil mixture in each chamber is vented via a first series of vents 24 to the breather where the air and oil are separated. The breather is used as a pump to pump the separated oil back to the oil tank via a scavenge line 35 which includes a relief valve 38. A bleed line 36 takes some of the oil from line 35 to the main oil supply gallery 23 via a non-return check valve 37. In normal flight pump 20 supplies the gallery 23 from the tank 18 via pump inlet 19, the relief valve 38 being set to a pressure lower than that of relief valve 40 which controls the pump pressure. The check valve 37 thus remains shut. When the inlet 19 is starved of oil because the flight attitude of the aircraft changes, the pressure in gallery 23 drops to the extent that check valve 37 opens and the breather/pump takes over circulating oil from the gearbox and bearings around the second system.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
Rolls Royce, LimitedLONDON, GB5

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Smith, Stanley Wotton-under-Edge, GB2 13 169

Cited Art Landscape

  • No Cited Art to Display

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (2)
* 6367738 Aerobatic aircraft 8 2000
* 2011/0100,757 LUBRICATION SCAVENGE SYSTEM 0 2011
 
GENERAL ELECTRIC COMPANY (1)
* 5040366 Fluid transfer device 13 1989
 
SIKORSKY AIRCRAFT CORPORATION (2)
* 8459413 Lubrication system with prolonged loss of lubricant operation 2 2007
* 2010/0025,159 LUBRICATION SYSTEM WITH PROLONGED LOSS OF LUBRICANT OPERATION 1 2007
 
SIEMENS AKTIENGESELLSCHAFT (1)
* 9188023 Oil supply system for a stationary turbomachine 0 2011
 
HONEYWELL INTERNATIONAL INC. (7)
7506724 Active gas turbine lubrication system flow control 9 2004
* 2006/0054,406 Active gas turbine lubrication system flow control 12 2004
8485222 Systems and methods for preventing oil migration 1 2007
7725236 Maneuver based aircraft gas turbine engine speed control 0 2007
* 2009/0099,750 Manuever-based aircraft gas turbine engine speed control system and method 0 2007
* 2009/0078,508 ELECTRIC MOTOR DRIVEN LUBRICATION SUPPLY SYSTEM SHUTDOWN SYSTEM AND METHOD 2 2007
9644495 Thermal isolating service tubes and assemblies thereof for gas turbine engines 0 2013
 
PRATT & WHITNEY CANADA CORP. (18)
6463819 Uninterruptible oil supply system 28 2000
6398833 Air/oil separator 18 2000
* 6877950 Method and device for minimizing oil consumption in a gas turbine engine 16 2001
* 2003/0099,538 Method and device for minimizing oil consumption in a gas turbine engine 2 2001
6793042 Dual independent tank and oil system with single port filling 32 2002
* 2004/0016,601 Dual independent tank and oil system with single port filling 2 2002
7530430 Pressure lubrication for inverted flight 6 2004
* 2006/0090,964 Pressure lubrication for inverted flight 2 2004
8245818 Gas turbine oil scavenging system 2 2007
8201664 Lubrication system and method, and vortex flow separator for use therewith 2 2008
* 2009/0183,950 LUBRICATION SYSTEM AND METHOD, AND VORTEX FLOW SEPARATOR FOR USE THEREWITH 5 2008
8578967 Pressure regulating valve for aircraft engine 0 2009
* 2010/0187,451 PRESSURE REGULATING VALVE FOR AIRCRAFT ENGINE 2 2009
8601785 Oil supply system with main pump deaeration 0 2010
* 8312969 Lubrication system for aircraft engine 1 2010
* 2011/0315,484 LUBRICATION SYSTEM FOR AIRCRAFT ENGINE 0 2010
8870699 Lubrication oil system for a reduction gearbox 0 2013
9279367 Pressure regulating valve for aircraft engine 0 2013
 
ROLLS-ROYCE DEUTSCHLAND LTD & CO KG (2)
8122698 Vent for the lubricating oil system of a jet engine 0 2008
* 2009/0025,363 Vent for the lubricating oil system of a jet engine 0 2008
 
HAMILTON SUNDSTRAND CORPORATION (1)
8657931 Gearbox deoiler with sychnronizer 0 2011
 
ROLLS-ROYCE CORPORATION (4)
* 4974410 Inverted flight valve 10 1989
7878303 Lubrication scavenge system 3 2007
7789200 Sump housing 0 2007
8201663 Lubrication scavenge system 1 2011
 
MTU MOTOREN- UND TURBINEN-UNION MUENCHEN GMBH (1)
* 4899959 Gas turbine power plant arrangement 11 1988
 
Sundstrand Corporation (1)
* 4732236 Dual impeller pump 3 1986
 
SNECMA (1)
8672095 Method and system for lubricating a turbine engine 1 2009
 
UNITED TECHNOLOGIES CORPORATION (17)
* 5121599 Oil filtration system and method 16 1991
* 6033450 Deoiler shaft vortex separator 26 1995
* 5716423 Multi-stage deoiler with porous media 17 1995
8424646 Interruption tolerant lubrication system 0 2006
8210316 Oil scavenge system for a gas turbine engine 5 2006
* 2008/0134,657 Oil Scavenge System for a Gas Turbine Engine 7 2006
* 2009/0133,376 COMBINED GEARBOX BREATHER AND DRAIN MAST FOR JET AIRCRAFT ENGINE 6 2007
8181746 Continuous supply fluid reservoir 7 2008
8146711 Reduced gulp fluid reservoir 0 2008
* 2010/0065,374 CONTINUOUS SUPPLY FLUID RESERVOIR 4 2008
* 8230974 Windmill and zero gravity lubrication system for a gas turbine engine 7 2009
* 2010/0294,597 WINDMILL AND ZERO GRAVITY LUBRICATION SYSTEM 6 2009
8348017 Reduced gulp fluid reservoir 2 2011
8997935 Continuous supply fluid reservoir 0 2012
8602165 Continuous supply fluid reservoir 1 2012
9206741 Fluid system with gravity controlled valve 0 2012
* 9790855 Apparatus and method for providing damper liquid in a gas turbine engine 0 2013
* Cited By Examiner