GB647211A - Improvements in or relating to pneumatic pressure operated control systems for aircraft - Google Patents
Improvements in or relating to pneumatic pressure operated control systems for aircraftInfo
- Publication number
- GB647211A GB647211A GB2312747A GB2312747A GB647211A GB 647211 A GB647211 A GB 647211A GB 2312747 A GB2312747 A GB 2312747A GB 2312747 A GB2312747 A GB 2312747A GB 647211 A GB647211 A GB 647211A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- valve
- air
- line
- traverses
- 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
647,211. Pneumatic single-stroke apparatus. ELECTRO-HYDRAULICS, Ltd. Aug. 20, 1947, No. 23127. [Class 8(ii)] A pneumatic pressure operated jack control system comprises an alternative supply 10, Fig. 1, of pneumatic pressure capable of being placed in communication with both sides of the jack piston 7 by an alternative operation valve 11 and alternative supply lines 12, 13, 15; the line 13 to one side of the piston being unrestricted, whilst the line 15 to the other side includes a restrictor 14. To retract the piston 7 using the normal pressure source, air from an accumulator 1 traverses a selector valve 3 and a duct 4 to depress a piston 81 of a shuttle valve 8 and gain access to the retraction side of the piston. Air on the upper, i.e. the extension side is exhausted through a valve 9, a line 5 and a port 6. In the event of failure of the accumulator 1 and using the alternative pressure supply to effect extension, air from the accumulator traverses the valve 11, line 13 and valve 8 to the retraction side of the piston 7, and simultaneously but at a slower rate air traverses the restrictor 14, line 15 and valve 9 to build up an equal pressure on the extension side of the piston and extends the same by differential action. In a modification and using the normal supply source 1, Fig. 4, to effect extension, air leaving the valve 8 traverses ducts 93, 94 the valve 9. a duct 97 to displace a piston 22 connected by a rod 20 to a piston 21 of larger cross-section of a shuttle control valve 16 to allow the air to traverse a duct 98 to the retraction side of the piston 7. Simultaneously but at slower rate air traverses the restrictor 14 and line 15 to build up an equal pressure on the extension side of the piston 7 and also on the piston 21 to displace the latter to its former position and thereby connect the retraction side of the piston 7 to exhaust through the line 98 and an exhaust port 18 and thus render the piston 7 free to be extended. When using the alternative pressure .supply 10 to effect extension air displaces the piston 81 of valve 8 to gain access to the line 93 after which the action is as described using the normal air supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2312747A GB647211A (en) | 1947-08-20 | 1947-08-20 | Improvements in or relating to pneumatic pressure operated control systems for aircraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2312747A GB647211A (en) | 1947-08-20 | 1947-08-20 | Improvements in or relating to pneumatic pressure operated control systems for aircraft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB647211A true GB647211A (en) | 1950-12-06 |
Family
ID=10190564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2312747A Expired GB647211A (en) | 1947-08-20 | 1947-08-20 | Improvements in or relating to pneumatic pressure operated control systems for aircraft |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB647211A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2684066A1 (en) * | 1991-11-26 | 1993-05-28 | Messier Bugatti | SYSTEM FOR ACTUATING THE MANIFOLD OF MANEUVER OF AN AIRCRAFT LANDING TRAIN. |
-
1947
- 1947-08-20 GB GB2312747A patent/GB647211A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2684066A1 (en) * | 1991-11-26 | 1993-05-28 | Messier Bugatti | SYSTEM FOR ACTUATING THE MANIFOLD OF MANEUVER OF AN AIRCRAFT LANDING TRAIN. |
| EP0544560A1 (en) * | 1991-11-26 | 1993-06-02 | Messier Bugatti | Operating system for the actuating cylinder of an aircraft landing gear |
| US5284083A (en) * | 1991-11-26 | 1994-02-08 | Messier-Bugatti | System for powering the driving actuator of an aircraft undercarriage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2618243A (en) | Alternative control system for fluid-operated motors | |
| GB647211A (en) | Improvements in or relating to pneumatic pressure operated control systems for aircraft | |
| GB600397A (en) | Improvements in or relating to controlling means for high speed aircraft | |
| GB1160328A (en) | A System for Supplying Fluid to Advanceable Mining Apparatus | |
| GB666768A (en) | Hydraulic servo brake system | |
| GB670717A (en) | Improvements in or relating to hose reels | |
| GB730561A (en) | Improvements in or relating to hydraulic jacks | |
| GB638679A (en) | Improvements in or relating to fluid pressure operated jacking systems | |
| GB563459A (en) | Means for reduction or suppression of dust in coal-cutting | |
| GB653132A (en) | Improvements in and relating to hydraulic servo mechanisms | |
| GB893592A (en) | Control system for use with hydraulically or pneumatically operated jacks | |
| Lamb | Rondo serio | |
| GB581665A (en) | Improvements in or relating to hydraulic control systems | |
| GB1381356A (en) | Fluid circutis including piston and cylinder devices | |
| GB909764A (en) | Fluid-pressure-operated motors | |
| GB716538A (en) | Fluid-metering valve for hydraulic motor control system | |
| GB890644A (en) | Improvements in or relating to hydraulic jacks, pit props or the like | |
| GB652093A (en) | Improvements in or relating to retractable undercarriages | |
| GB652640A (en) | Fluid pressure motor system for operating tyre building drums | |
| GB719170A (en) | Improvements in or relating to propping-up devices for mines | |
| GB633129A (en) | Improvements in or connected with the mechanical brake systems of winding engines, haulages and other rotating machines | |
| CH254122A (en) | Compressed air servo control device for hydraulic vehicle brakes. | |
| GB755078A (en) | Improvements relating to liquid pressure operated jacks | |
| GB572839A (en) | Improvements in fluid containers | |
| GB940166A (en) | Improvements in or relating to pneumatic motors |