GB875126A - Improvements relating to hydraulic control systems - Google Patents
Improvements relating to hydraulic control systemsInfo
- Publication number
- GB875126A GB875126A GB27678/56A GB2767856A GB875126A GB 875126 A GB875126 A GB 875126A GB 27678/56 A GB27678/56 A GB 27678/56A GB 2767856 A GB2767856 A GB 2767856A GB 875126 A GB875126 A GB 875126A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- line
- jack
- pipeline
- piston
- 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
-
- 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)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
875,126. Valves. FAIREY CO. Ltd. Dec. 10, 1957 [Sept. 10, 1956]. No. 27678/56. Class 135. An hydraulic control system for controlling the supply of emergency pressure liquid from an inlet pipe 11 to a jack 1 operating aircraft control surfaces, undercarriage &c. which is normally supplied with liquid from a pipeline 5 controlled by a valve 2 operated by the pilot's control member 4, comprises a control valve assembly consisting of tandem valves 16, 18 of which the former, loaded by a spring 28, is normally closed while the latter is normally open, and a hand lever 40, operation of which through a cam 41 and ball follower 42, first closes valve 18 and then opens valve 16. As shown, valve 16 is connected to jack 1 by a pipeline 15 incorporating a shuttle valve including a free piston 13 normally urged to the left of its cylinder 12 by pressure in pipeline 7. Any leakage of liquid past piston 13 escapes via pipeline 15 and a passage 30 in plunger 22 to the main return line 10, so preventing any pressure build-up in line 15. Upon failure of the main pressure supply operation of handle 40 first closes valve 18 to isolate line 15 from return line 10, and then opens valve 16 against spring 28 to allow the emergency power liquid to pass from line 11 to line 15, move shuttle piston 13 to the right and thus operate jack 1. The end of valve 16 forms a piston 43 working in a cylinder 44 connected by a line 47 to return line 10, so that any pressure build-up in the latter tends to maintain valve 16 closed. This arrangement only permits one-way emergency operation of jack 1, e.g. for operating landing flaps, but in a modification, Fig. 2 (not shown), two-way operation is permitted by omitting the shuttle valve and connecting line 15 directly to control valve 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB27678/56A GB875126A (en) | 1956-09-10 | 1956-09-10 | Improvements relating to hydraulic control systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB27678/56A GB875126A (en) | 1956-09-10 | 1956-09-10 | Improvements relating to hydraulic control systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB875126A true GB875126A (en) | 1961-08-16 |
Family
ID=10263501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27678/56A Expired GB875126A (en) | 1956-09-10 | 1956-09-10 | Improvements relating to hydraulic control systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB875126A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011141086A3 (en) * | 2010-04-16 | 2012-05-18 | Blasberg Gmbh | Hydraulic valve |
-
1956
- 1956-09-10 GB GB27678/56A patent/GB875126A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011141086A3 (en) * | 2010-04-16 | 2012-05-18 | Blasberg Gmbh | Hydraulic valve |
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