EP2196635B1 - Device for avoiding high oil tank pressures under negative g conditions - Google Patents
Device for avoiding high oil tank pressures under negative g conditions Download PDFInfo
- Publication number
- EP2196635B1 EP2196635B1 EP09010617.0A EP09010617A EP2196635B1 EP 2196635 B1 EP2196635 B1 EP 2196635B1 EP 09010617 A EP09010617 A EP 09010617A EP 2196635 B1 EP2196635 B1 EP 2196635B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oil tank
- oil
- conditions
- breather
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/06—Means for keeping lubricant level constant or for accommodating movement or position of machines or engines
- F01M11/062—Accommodating movement or position of machines or engines, e.g. dry sumps
- F01M11/065—Position
- F01M11/067—Position inverted, e.g. for inverted flight
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0318—Processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86348—Tank with internally extending flow guide, pipe or conduit
Definitions
- the invention relates to a device for avoiding high oil tank pressures under negative g conditions, and more particularly to an aircraft gas turbine oil tank according to the features of the preamble of claim 1.
- the invention relates to an oil tank having a breather outlet pipe branched from an upper portion of the oil tank and connected to a breather, and a breather connection pipe connected to a lower portion of the tank.
- US 4,287,913 discloses an aircraft gas turbine oil tank under negative g conditions.
- breath pressure loss increases due to the blockage or blockage of the deaerator with oil. This leads to oil spills, contamination of bleed air, smell of oil in the aircraft cabin and sealing problems in the storage chambers of an aircraft gas turbine.
- the invention has for its object to provide an aircraft gas turbine oil tank of the type described above, which has a high level of reliability with a simple structure and simple, cost manufacturability and in particular is functional under negative g conditions.
- an air duct is arranged in the upper region of the oil tank. This is open on both sides and extends into the breather outlet pipe, in which it protrudes and the other end of the air duct opens in the central region of the oil tank.
- the inventive design prevents a high pressure in the oil tank results in negative g conditions.
- the air duct pressure equalization takes place between the breather outlet pipe (the vent line of the oil tank) and the interior of the oil tank. This pressure equalization is performed by the air duct in an automatic manner.
- the air flowing through the air duct expands in the area of the breather outlet pipe leading to the breather and thus reduces the flow area available for the oil flow to the breather in the breather outlet pipe.
- the air guide tube according to the invention is thus a tube which extends from a vent opening (deaerator outlet tube or vent tube) of the oil tank into the interior of the oil tank.
- the air duct is fixed in the oil tank so that the vent of the oil tank, especially under positive g conditions is not blocked.
- the length of the air guide tube so that it extends below the oil level line under normal g conditions and thus dips into the oil.
- the air flowing out through the air guide tube counteracts a strong increase in pressure in the oil tank, which is caused by the incoming ventilation volumes and return volumes of oil.
- the air guide tube according to the invention is arranged stationarily in the oil tank and has no moving parts.
- the arrangement can be made on a wall of the oil tank, it is possible to arrange the Heilleitrohr centrally in the oil tank.
- a dimensioning of the diameter of the Heilleitrohrs can be easily adapted to the particular circumstances.
- the inventive design minimizes the risk of wear and / or malfunction.
- One Another advantage is that the Heilleitrohr invention can be realized very inexpensively and can also be retrofitted into existing tank designs.
- the Fig. 1 to 4 schematically show an oil tank 1, at its upper portion a breather outlet pipe 2 is arranged, which leads to a breather (Breather).
- a connecting pipe 6 is provided, which is connected for example to a return line.
- oil 5 is in the lower region of the oil tank 1, the air above the oil 5 has a pressure P1 and in the breather outlet pipe 2 there is a pressure P2.
- the air flow is shown by the arrow 4.
- the 3 and 4 show an embodiment of the invention with a schematically illustrated Gutleitrohr 3.
- Die Fig. 3 shows an operating condition with positive g conditions.
- the oil 5 is in the lower region of the oil tank 1, the air duct 3 is "out of function".
- the stated pressures prevail, where P1> P2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Description
Die Erfindung bezieht sich auf eine Vorrichtung zur Vermeidung von hohen Öltank-Drücken unter negativen g-Bedingungen und insbesondere auf einen Fluggasturbinen-Öltank gemäß den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a device for avoiding high oil tank pressures under negative g conditions, and more particularly to an aircraft gas turbine oil tank according to the features of the preamble of claim 1.
Im Einzelnen bezieht sich die Erfindung auf einen Öltank mit einem von einem oberen Bereich des Öltanks abzweigenden, mit einem Entlüfter verbundenen Entlüfter-Auslassrohr sowie mit einem mit einem unteren Bereich des Tanks verbundenen Entlüfter-Anschlussrohr.
Unter positiven, normalen g-Bedingungen wirkt die Schwerkraft so, dass das in einem Öltank befindliche Öl sich in dem unteren Bereich des Tanks sammelt. Oberhalb des Öls befindet sich Luft, welche mit Ölpartikeln kontaminiert sein kann. Diese Luft wird zu einem Entlüfter (Breather) geleitet, in welchem die Ölpartikel abgeschieden werden.Under positive, normal g conditions, gravity acts so that the oil in an oil tank collects in the lower part of the tank. Above the oil is air, which may be contaminated with oil particles. This air is directed to a breather, where the oil particles are separated.
Unter negativen g-Bedingungen wirkt die Schwerkraft in entgegengesetzter oder teilweise entgegengesetzter Richtung. Hierdurch sammelt sich der Inhalt des Öltanks nicht am unteren Bereich des Öltanks, sondern am oberen Bereich, wo sich das Entlüfter-Auslassrohr befindet. Dieses wird bei negativen g-Bedingungen durch das Öl blockiert.Under negative g-conditions, gravity acts in opposite or partially opposite directions. As a result, the content of the oil tank does not accumulate at the bottom of the oil tank, but at the top, where the breather outlet pipe is located. This is blocked by the oil in negative g conditions.
Hierdurch ergibt sich der Nachteil, dass das Entlüfter-Auslassrohr mit Öl gefüllt wird und der Entlüfter (Breather) ebenfalls mit Öl anstelle von Luft versorgt wird.This has the disadvantage that the breather outlet pipe is filled with oil and the breather (Breather) is also supplied with oil instead of air.
Hierdurch ergibt sich ein drastischer Anstieg des Drucks im Öltank, insbesondere, da die Rückführpumpen weiterhin Öl in den Tank fördern. Dies kann Probleme hinsichtlich der Druckfestigkeit des Öltanks geben.This results in a drastic increase in the pressure in the oil tank, in particular, since the return pumps continue to promote oil in the tank. This can give problems regarding the pressure resistance of the oil tank.
Weiterhin erhöht sich der Druckverlust im Entlüfter (Breather-Druckverlust) durch die Verblockung oder Verstopfung des Entlüfters mit Öl. Dies führt zu Ölaustritten, zu einer Kontamination von Zapfluft, zu Ölgeruch in der Flugzeugkabine sowie zu Abdichtproblemen in den Lagerkammern einer Fluggasturbine.Furthermore, the pressure loss in the breather (breather pressure loss) increases due to the blockage or blockage of the deaerator with oil. This leads to oil spills, contamination of bleed air, smell of oil in the aircraft cabin and sealing problems in the storage chambers of an aircraft gas turbine.
Der Erfindung liegt die Aufgabe zugrunde, einen Fluggasturbinen-Öltank der eingangs beschriebenen Art zu schaffen, welcher bei einfachem Aufbau und einfacher, kostengünstiger Herstellbarkeit ein hohes Maß an Betriebssicherheit aufweist und insbesondere unter negativen g-Bedingungen funktionsfähig ist.The invention has for its object to provide an aircraft gas turbine oil tank of the type described above, which has a high level of reliability with a simple structure and simple, cost manufacturability and in particular is functional under negative g conditions.
Erfindungsgemäß wird die Aufgabe durch die Merkmalskombination des Anspruchs 1 gelöst, die Unteransprüche zeigen weitere vorteilhafte Ausgestaltungen der Erfindung.According to the invention the object is achieved by the combination of features of claim 1, the dependent claims show further advantageous embodiments of the invention.
Erfindungsgemäß ist somit vorgesehen, dass im oberen Bereich des Öltanks ein Luftleitrohr angeordnet ist. Dieses ist beidseitig offen und erstreckt sich in das Entlüfter-Auslassrohr, in welches es hineinragt und das andere Ende des Luftleitrohrs mündet im mittleren Bereich des Öltanks.According to the invention it is thus provided that an air duct is arranged in the upper region of the oil tank. This is open on both sides and extends into the breather outlet pipe, in which it protrudes and the other end of the air duct opens in the central region of the oil tank.
Durch die erfindungsgemäße Ausgestaltung wird verhindert, dass sich ein hoher Druck in dem Öltank bei negativen g-Bedingungen ergibt. Durch das Luftleitrohr erfolgt ein Druckausgleich zwischen dem Entlüfter-Auslassrohr (der Entlüftungsleitung des Öltanks) und dem Innenraum des Öltanks. Dieser Druckausgleich wird durch das Luftleitrohr in automatischer Weise durchgeführt.The inventive design prevents a high pressure in the oil tank results in negative g conditions. Through the air duct pressure equalization takes place between the breather outlet pipe (the vent line of the oil tank) and the interior of the oil tank. This pressure equalization is performed by the air duct in an automatic manner.
Die durch das Luftleitrohr strömende Luft expandiert im Bereich des Entlüfter-Auslassrohrs, welches zum Entlüfter (Breather) führt und verringert so den für den Ölvolumenstrom zum Entlüfter im Entlüfter-Auslassrohr zur Verfügung stehenden Strömungsquerschnitt.The air flowing through the air duct expands in the area of the breather outlet pipe leading to the breather and thus reduces the flow area available for the oil flow to the breather in the breather outlet pipe.
Da durch das Luftleitrohr Luft in das Entlüfter-Auslassrohr und damit in den Entlüfter geleitet wird, wird ein Druckaufbau in dem Öltank verhindert.As air is directed through the air duct into the breather outlet pipe and thus into the breather, pressure buildup in the oil tank is prevented.
Das erfindungsgemäße Luftleitrohr ist somit ein Rohr, das sich von einer Entlüftungsöffnung (Entlüfter-Auslassrohr oder Entlüftungsrohr) des Öltanks in den Innenraum des Öltanks erstreckt. Das Luftleitrohr ist dabei so im Öltank fixiert, dass die Entlüftung des Öltanks, insbesondere unter positiven g-Bedingungen nicht blockiert wird.The air guide tube according to the invention is thus a tube which extends from a vent opening (deaerator outlet tube or vent tube) of the oil tank into the interior of the oil tank. The air duct is fixed in the oil tank so that the vent of the oil tank, especially under positive g conditions is not blocked.
Erfindungsgemäß ist es möglich, die Länge des Luftleitrohrs so auszubilden, dass sich dieses unter normalen g-Bedingungen bis unterhalb der Öl-Füllstandslinie erstreckt und somit in das Öl eintaucht.According to the invention, it is possible to design the length of the air guide tube so that it extends below the oil level line under normal g conditions and thus dips into the oil.
Wenn nunmehr unter negativen g-Bedingungen der Druck in dem Öltank ansteigt, bewirkt das Luftleitrohr Folgendes:
- Entsprechend dem Druckgradienten wird somit auch bei negativen g-Bedingungen Öl in das Entlüfter-Auslassrohr und damit zum Entlüfter strömen. Dieses Öl wird aus dem Entlüfter-Auslassrohr abgesaugt, im Gegensatz zu dem Rest des Öls in dem Öltank. Durch das erfindungsgemäße Luftleitrohr kann somit relativ schnell Luft aus dem Innenbereich des Öltanks in das Entlüfter-Auslassrohr angesaugt werden.
- According to the pressure gradient, oil will thus flow into the vent outlet pipe and thus to the deaerator even in the case of negative g conditions. This oil is extracted from the breather outlet tube, unlike the rest of the oil in the oil tank. As a result of the air guide tube according to the invention, it is thus possible to suck in air from the inner region of the oil tank into the deaerator outlet tube relatively quickly.
Aufgrund der geringeren Viskosität wird somit eine deutlich größere Menge Luft als Öl in das Entlüfter-Auslassrohr angesaugt. Die Luft expandiert im Entlüfter-Auslassrohr aufgrund des geringeren Druckes und verringert damit den für das Öl zur Verfügung stehenden Strömungsquerschnitt. Hierdurch wird ein weiterer Ölfluss durch das Entlüfter-Auslassrohr zum Entlüfter reduziert.Due to the lower viscosity, a significantly larger amount of air than oil is sucked into the breather outlet pipe. The air expands in the breather outlet tube due to the lower pressure and thus reduces the flow area available for the oil. This will reduce further oil flow through the breather outlet tube to the breather.
Die durch das Luftleitrohr ausströmende Luft wirkt einem starken Druckanstieg im Öltank entgegen, welcher durch die eintretenden Entlüftungsvolumina und Rückführvolumina an Öl verursacht wird.The air flowing out through the air guide tube counteracts a strong increase in pressure in the oil tank, which is caused by the incoming ventilation volumes and return volumes of oil.
Erfindungsgemäß werden somit extreme Drücke in dem Öltank ebenso vermieden, wie eine Überflutung des Entlüfters (Breathers). Unter normalen g-Bedingungen wirkt sich das Luftleitrohr nicht oder nur äußerst gering aus.Thus, according to the invention, extreme pressures in the oil tank are avoided as well as flooding of the breather. Under normal g conditions, the air duct will not work or will be very light.
Das erfindungsgemäße Luftleitrohr ist stationär in dem Öltank angeordnet und weist keinerlei bewegte Teile auf. Die Anordnung kann an einer Wandung des Öltanks erfolgen, es ist möglich, das Luftleitrohr mittig in dem Öltank anzuordnen. Auch eine Dimensionierung des Durchmessers des Luftleitrohrs kann in einfacher Weise an die jeweiligen Gegebenheiten angepasst werden. Durch die erfindungsgemäße Ausgestaltung ist das Risiko von Verschleiß und/oder Fehlfunktionen minimiert. Ein weiterer Vorteil besteht darin, dass das erfindungsgemäße Luftleitrohr sehr kostengünstig realisierbar ist und auch in bestehende Tank-Designs nachträglich eingebaut werden kann.The air guide tube according to the invention is arranged stationarily in the oil tank and has no moving parts. The arrangement can be made on a wall of the oil tank, it is possible to arrange the Luftleitrohr centrally in the oil tank. A dimensioning of the diameter of the Luftleitrohrs can be easily adapted to the particular circumstances. The inventive design minimizes the risk of wear and / or malfunction. One Another advantage is that the Luftleitrohr invention can be realized very inexpensively and can also be retrofitted into existing tank designs.
Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels in Verbindung mit der Zeichnung beschrieben. Dabei zeigt:
- Fig. 1
- eine schematische Darstellung eines Öltanks unter positiven g-Bedingungen gemäß dem Stand der Technik,
- Fig. 2
- eine Darstellung, analog
Fig. 1 , unter negativen g-Bedingungen gemäß dem Stand der Technik, - Fig. 3
- eine Darstellung, analog
Fig. 1 , einer erfindungsgemäßen Ausgestaltung unter positiven g-Bedingungen, und - Fig. 4
- eine Darstellung, analog
Fig. 2 , einer erfindungsgemäßen Ausgestaltung unter negativen g-Bedingungen.
- Fig. 1
- a schematic representation of an oil tank under positive g conditions according to the prior art,
- Fig. 2
- a representation, analog
Fig. 1 under negative g conditions according to the prior art, - Fig. 3
- a representation, analog
Fig. 1 , An embodiment of the invention under positive g conditions, and - Fig. 4
- a representation, analog
Fig. 2 , An embodiment of the invention under negative g conditions.
Die
Bei einem Zustand mit negativen g-Bedingungen wird das Öl gemäß dem Stand der Technik, so wie in
Die
Bei negativen g-Bedingungen (
- 11
- Öltankoil tank
- 22
- Entlüfter-AuslassrohrBreather outlet pipe
- 33
- Luftleitrohrair guide
- 44
- Luftströmungairflow
- 55
- Öloil
- 66
- Anschlussrohrconnecting pipe
- 77
- expandierende Luftexpanding air
Claims (3)
- Aircraft gas-turbine having an oil tank with a breather outlet tube (2) branching off from an upper area of the oil tank (1) and connecting to a breather and with a connecting tube (6) joining a bottom area of the oil tank (1), characterized in that in the upper area of the oil tank (1) an air guide tube (3) which is open at both ends is arranged, with the air guide tube (3) protruding into the breather outlet tube (2) and extending towards a center area of the oil tank (1).
- Aircraft gas-turbine having an oil tank in accordance with Claim 1, characterized in that in the normal state of the oil tank (1) under positive g conditions, the air guide tube (3) substantially extends in the vertical direction.
- Aircraft gas-turbine having an oil tank in accordance with Claim 1 or 2, characterized in that in the normal state of the oil tank under positive g conditions, the bottom area of the air guide tube (3) issues beneath an oil filling level.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810058981 DE102008058981A1 (en) | 2008-11-25 | 2008-11-25 | Device for avoiding high oil tank pressures under negative g conditions |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2196635A2 EP2196635A2 (en) | 2010-06-16 |
EP2196635A3 EP2196635A3 (en) | 2011-06-15 |
EP2196635B1 true EP2196635B1 (en) | 2015-11-11 |
Family
ID=41694755
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09010617.0A Not-in-force EP2196635B1 (en) | 2008-11-25 | 2009-08-18 | Device for avoiding high oil tank pressures under negative g conditions |
Country Status (3)
Country | Link |
---|---|
US (1) | US8256458B2 (en) |
EP (1) | EP2196635B1 (en) |
DE (1) | DE102008058981A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9366156B2 (en) * | 2012-09-28 | 2016-06-14 | United Technologies Corporation | Axial sealing gravity based siphon system |
US20140090930A1 (en) | 2012-09-28 | 2014-04-03 | United Technologies Corporation | Multiple reservoir lubrication system |
US9416729B2 (en) | 2013-03-21 | 2016-08-16 | United Technologies Corporation | Oil tank mount with yoke |
US9086014B2 (en) | 2013-03-21 | 2015-07-21 | United Technologies Corporation | Oil tank mount with lock |
US9863324B2 (en) | 2013-03-21 | 2018-01-09 | United Technologies Corporation | Oil tank mount with stiffeners |
US9925685B2 (en) * | 2015-10-30 | 2018-03-27 | Yamabiko Corporation | Chainsaw |
US9981752B2 (en) | 2016-09-27 | 2018-05-29 | Pratt & Whitney Canada Corp. | Liquid tank system with over pressure protection |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4287913A (en) * | 1979-09-29 | 1981-09-08 | Rolls-Royce Limited | Tank suitable for holding liquids |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2245198A (en) * | 1938-10-18 | 1941-06-10 | Wright Aeronautical Corp | Oil tank |
DE896598C (en) * | 1944-03-28 | 1953-11-12 | Messerschmitt Boelkow Blohm | Fluid containers, in particular operating fluid containers for aircraft engines |
US2679333A (en) * | 1952-03-08 | 1954-05-25 | Northrop Aircraft Inc | Variable length tank vent |
US2982374A (en) * | 1959-02-25 | 1961-05-02 | United Aircraft Prod | Liquid storage tank for aircraft |
US3130022A (en) * | 1960-03-22 | 1964-04-21 | English Electric Co Ltd | Liquid reservoirs for aircraft |
US3049138A (en) * | 1961-04-27 | 1962-08-14 | United Aircraft Prod | Liquid storage tank |
US3889705A (en) * | 1973-08-30 | 1975-06-17 | Northrop Corp | Hydraulic system reservoir having separate oil and air-oil chambers |
JPS58113811A (en) | 1981-12-28 | 1983-07-06 | Yutani Tekko Kk | Device for detecting number of revolution of rotary body |
JPS58113811U (en) * | 1982-01-28 | 1983-08-03 | いすゞ自動車株式会社 | Engine air bleed structure |
FR2660280B1 (en) * | 1990-03-27 | 1995-05-05 | Aerospatiale | TANK FOR AIRCRAFT, ESPECIALLY FOR HELICOPTER HYDRAULIC CIRCUIT. |
DE19529733C1 (en) * | 1995-08-12 | 1996-12-05 | Mtu Friedrichshafen Gmbh | Lubricant supply system for vehicle combustion engine |
GB0016196D0 (en) * | 2000-06-30 | 2000-08-23 | Lucas Industries Ltd | Oil system |
US6463819B1 (en) * | 2000-10-24 | 2002-10-15 | Pratt & Whitney Canada Corp. | Uninterruptible oil supply system |
-
2008
- 2008-11-25 DE DE200810058981 patent/DE102008058981A1/en not_active Withdrawn
-
2009
- 2009-08-18 EP EP09010617.0A patent/EP2196635B1/en not_active Not-in-force
- 2009-09-09 US US12/556,224 patent/US8256458B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4287913A (en) * | 1979-09-29 | 1981-09-08 | Rolls-Royce Limited | Tank suitable for holding liquids |
Also Published As
Publication number | Publication date |
---|---|
US20100126589A1 (en) | 2010-05-27 |
US8256458B2 (en) | 2012-09-04 |
EP2196635A2 (en) | 2010-06-16 |
DE102008058981A1 (en) | 2010-05-27 |
EP2196635A3 (en) | 2011-06-15 |
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