GB990046A - Improvements in or relating to hydraulic valves - Google Patents
Improvements in or relating to hydraulic valvesInfo
- Publication number
- GB990046A GB990046A GB1886260A GB1886260A GB990046A GB 990046 A GB990046 A GB 990046A GB 1886260 A GB1886260 A GB 1886260A GB 1886260 A GB1886260 A GB 1886260A GB 990046 A GB990046 A GB 990046A
- Authority
- GB
- United Kingdom
- Prior art keywords
- port
- slider
- fluid
- pressure
- valve
- 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
- 239000012530 fluid Substances 0.000 abstract 7
- 239000003245 coal Substances 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
- E21D23/0065—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices driven, or automatically, e.g. electrically-hydraulically controlled
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
990,046. Valves. COAL INDUSTRY (PATENTS) Ltd. May 25, 1961 [May 27, 1960], No. 18862/60. Heading F2V. A valve comprises a slider for connecting a first port to either a second or third port, an inlet through which operating fluid can move the slider, return means for the slider, means for applying fluid pressure to hold the slider against the action of the return means even if the operating pressure is removed, and selectively operable means to over-ride the effect of the fluid pressure and allow the return means to actuate the slider. When a supply of pressure fluid, controlled for example by a solenoid valve, is admitted to a port 10 it displaces a cap 39 and a closure member 41 to the left so that pressure fluid from a second port 9 flows through a seat 31 to a port 8 connected through a restrictor to apparatus, such as a pit prop. The port 8 is connected by a conduit (not shown) to a port 6 so that the pressure fluid also acts on a piston 43 to hold the closure member in its leftward position against a spring 46 after the solenoid valve has closed. Admission of pressure fluid to a port 5 restores the closure member to its original position in which the apparatus is connected to an exhaust port 7. The valve may be manually actuated by a key-operated screw 47. If the area of the cap 39 is smaller than that of a seat 25 the port 6 may be dispensed with since the hydraulic pressures in the spaces connected to ports 8 and 9 hold the valve in the operated position.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1886260A GB990046A (en) | 1960-05-27 | 1960-05-27 | Improvements in or relating to hydraulic valves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1886260A GB990046A (en) | 1960-05-27 | 1960-05-27 | Improvements in or relating to hydraulic valves |
Publications (1)
Publication Number | Publication Date |
---|---|
GB990046A true GB990046A (en) | 1965-04-22 |
Family
ID=10119690
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1886260A Expired GB990046A (en) | 1960-05-27 | 1960-05-27 | Improvements in or relating to hydraulic valves |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB990046A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3798905A (en) * | 1972-07-31 | 1974-03-26 | Hydraulic Industries | Power assisted brake control device |
US4627467A (en) * | 1982-07-28 | 1986-12-09 | Pneumo Corporation | Pilot operated directional control valve |
-
1960
- 1960-05-27 GB GB1886260A patent/GB990046A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3798905A (en) * | 1972-07-31 | 1974-03-26 | Hydraulic Industries | Power assisted brake control device |
US4627467A (en) * | 1982-07-28 | 1986-12-09 | Pneumo Corporation | Pilot operated directional control valve |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1069509A (en) | Automatically responsive shut-off valve | |
GB1132929A (en) | Improvements in or relating to relief valves | |
GB1182055A (en) | Fluid Flow Control Device | |
GB990046A (en) | Improvements in or relating to hydraulic valves | |
GB1270958A (en) | A valve arrangement | |
GB1182037A (en) | Improvements in or relating to fluid control valves | |
GB1114810A (en) | An improved control valve device for an hydraulic work circuit | |
GB1332579A (en) | Device for holding a control valve in an end position | |
GB1249963A (en) | Multiway valve | |
GB1066590A (en) | Rapid response hydraulic system | |
GB947170A (en) | A relief valve unit | |
GB836459A (en) | Improvements in fluid control valves | |
GB1128164A (en) | Improvements in or relating to fluid flow control valves | |
GB1038351A (en) | Hydraulic valves and apparatus incorporating such valves | |
GB756833A (en) | Improvements in or relating to tractor hydraulic systems and control valves therefor | |
GB1256326A (en) | Control means for flap valves | |
GB760863A (en) | An improved hydraulic steering gear for ships | |
GB1093497A (en) | Fluid-flow control valve | |
GB1291431A (en) | Improvements relating to hydraulic control valves | |
GB1261129A (en) | Improvements in or relating to fluid-flow control means | |
GB953738A (en) | Control slide valve | |
GB1428548A (en) | Pistonvalves having means for reducing the noise caused by cavitation therein | |
GB918259A (en) | Improvements in or relating to fluid supply means for hydraulic presses and the like | |
GB1187208A (en) | Improvements in or relating to a Pilot-operable Hydraulic Valve | |
GB1413111A (en) | Fluid valve |