GB973364A - Fluid-pressure-operated-systems - Google Patents
Fluid-pressure-operated-systemsInfo
- Publication number
- GB973364A GB973364A GB3653861A GB3653861A GB973364A GB 973364 A GB973364 A GB 973364A GB 3653861 A GB3653861 A GB 3653861A GB 3653861 A GB3653861 A GB 3653861A GB 973364 A GB973364 A GB 973364A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- line
- circuit
- pressure
- emergency
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/02—Undercarriages
- B64C25/08—Undercarriages non-fixed, e.g. jettisonable
- B64C25/10—Undercarriages non-fixed, e.g. jettisonable retractable, foldable, or the like
- B64C25/18—Operating mechanisms
- B64C25/22—Operating mechanisms fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/004—Fluid pressure supply failure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
973,364. Aircraft control systems. DOWTY ROTOL Ltd. Oct. 9, 1962 [Oct. 11, 1961], No. 36538/61. Heading B7G. An aircraft fluid pressure system comprises two normally separate fluid circuits, each comprising a fluid pressure generator, a motor, a " normal " selector valve which can connect one side of the motor either to the generator or to reservoir, a normally unpressurized emergency line connecting the circuit with the other circuit, and an " emergency " selector valve which, on loss of pressure in the other circuit, can be adjusted to permit pressure fluid from its circuit to pass through the emergency line to power the motor of the other circuit. In the Figure, a pump 13 in a line 12, driven by an electric motor (not shown), delivers fluid from a tank 11 through filter 15 to an undercarriage jack 20 through a two-position valve 16 operable by a solenoid 34. The valve connects one of the jack lines 18, 23 to line 12, and the other to a return line 31 in known manner. Line 18 contains a shuttle valve 19 with piston 19a. A pressure branch line 25 and return branch line 30 including a one-way valve 33 are connected to an " emergency " valve 26 operable by hand or by a solenoid. The second circuit, with primed references, is identical. A line 28 leads from valve 26 to shuttle valve 19<SP>1</SP>, and a line 28<SP>1</SP> from valve 26<SP>1</SP> to shuttle valve 19. With valves 26, 26<SP>1</SP> in the position shown, the two circuits are separate. The valves 16, 16<SP>1</SP> are shown in the undercarriage down position, being changed over for the undercarriage up position. Should pressure fail in, say, the first circuit, valve 26<SP>1</SP> can be changed over, to make pressure fluid available from pump 13<SP>1</SP> through line 28<SP>1</SP> and shuttle valve 19 (piston 19a being displaced), to extend jack 20. Equally, jack 20<SP>1</SP> can be extended should its normal supply fail, by operation of valve 26. The connections between the two circuits may be repeated to allow emergency contraction of both jacks, and emergency operation of undercarriage bay doors. Lines 28 and 28<SP>1</SP> may be vented during normal operation to prevent thermal pressure build-up.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3653861A GB973364A (en) | 1961-10-11 | 1961-10-11 | Fluid-pressure-operated-systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3653861A GB973364A (en) | 1961-10-11 | 1961-10-11 | Fluid-pressure-operated-systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB973364A true GB973364A (en) | 1964-10-28 |
Family
ID=10389069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3653861A Expired GB973364A (en) | 1961-10-11 | 1961-10-11 | Fluid-pressure-operated-systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB973364A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0155771A1 (en) * | 1984-02-28 | 1985-09-25 | Powell Duffryn Engineering Limited | Improvements relating to hydraulic fluid supply systems |
GB2265670A (en) * | 1992-03-18 | 1993-10-06 | Hoerbiger Ventilwerke Ag | An hydraulic actuating arrangement |
EP1495961A1 (en) * | 2003-07-08 | 2005-01-12 | Liebherr-Aerospace Lindenberg GmbH | Retractable undercarriage actuation system |
FR2907097A1 (en) * | 2006-10-17 | 2008-04-18 | Messier Bugatti Sa | HYDRAULIC SYSTEM ARCHITECTURE OF AIRCRAFT AIRBORNE MANEUVER |
FR2907096A1 (en) * | 2006-10-17 | 2008-04-18 | Messier Bugatti Sa | HYDRAULIC SYSTEM ARCHITECTURE OF AIRCRAFT AIRBORNE MANEUVER |
EP4006360A1 (en) * | 2020-11-30 | 2022-06-01 | Eaton Intelligent Power Limited | Redundant hydraulic power pack architecture for aircraft main landing gear system |
-
1961
- 1961-10-11 GB GB3653861A patent/GB973364A/en not_active Expired
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0155771A1 (en) * | 1984-02-28 | 1985-09-25 | Powell Duffryn Engineering Limited | Improvements relating to hydraulic fluid supply systems |
GB2265670A (en) * | 1992-03-18 | 1993-10-06 | Hoerbiger Ventilwerke Ag | An hydraulic actuating arrangement |
GB2265670B (en) * | 1992-03-18 | 1995-11-22 | Hoerbiger Ventilwerke Ag | An hydraulic actuating arrangement |
EP1495961A1 (en) * | 2003-07-08 | 2005-01-12 | Liebherr-Aerospace Lindenberg GmbH | Retractable undercarriage actuation system |
DE10330805B4 (en) * | 2003-07-08 | 2015-07-30 | Liebherr-Aerospace Lindenberg Gmbh | Aircraft landing gear control |
EP1914164A1 (en) * | 2006-10-17 | 2008-04-23 | Messier-Bugatti | Architecture of a hydraulic system for manoeuvring the landing gear of an aircraft |
FR2907096A1 (en) * | 2006-10-17 | 2008-04-18 | Messier Bugatti Sa | HYDRAULIC SYSTEM ARCHITECTURE OF AIRCRAFT AIRBORNE MANEUVER |
EP1914163A1 (en) * | 2006-10-17 | 2008-04-23 | Messier-Bugatti | Architecture of a hydraulic system for manoeuvring aircraft landing gear |
US8028954B2 (en) | 2006-10-17 | 2011-10-04 | Messier-Bugatti | Architecture for a hydraulic system for operating aircraft landing gear |
US8136760B2 (en) | 2006-10-17 | 2012-03-20 | Messier-Bugatti-Dowty | Architecture for a hydraulic system for operating aircraft landing gear |
FR2907097A1 (en) * | 2006-10-17 | 2008-04-18 | Messier Bugatti Sa | HYDRAULIC SYSTEM ARCHITECTURE OF AIRCRAFT AIRBORNE MANEUVER |
EP4006360A1 (en) * | 2020-11-30 | 2022-06-01 | Eaton Intelligent Power Limited | Redundant hydraulic power pack architecture for aircraft main landing gear system |
US12049302B2 (en) | 2020-11-30 | 2024-07-30 | Eaton Intelligent Power Limited | Redundant hydraulic power pack architecture for aircraft main landing gear system |
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