GB1303752A - - Google Patents
Info
- Publication number
- GB1303752A GB1303752A GB1981070A GB1981070A GB1303752A GB 1303752 A GB1303752 A GB 1303752A GB 1981070 A GB1981070 A GB 1981070A GB 1981070 A GB1981070 A GB 1981070A GB 1303752 A GB1303752 A GB 1303752A
- Authority
- GB
- United Kingdom
- Prior art keywords
- props
- valves
- throttle
- april
- bores
- 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
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- 239000004033 plastic 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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
- E21D23/26—Hydraulic or pneumatic control
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)
- Fluid-Pressure Circuits (AREA)
- Taps Or Cocks (AREA)
Abstract
1303752 Valves GEWERKSCHAFT EISENHUTTE WESTFALIA 24 April 1970 [24 April 1969] 19810/70 Heading F2V Valve suitable for mine roof support system having telescopic props carried by a frame, comprises a housing 1 containing two throttle valves connected to move in unison so that one opens as the other closes. The valve elements are in the form of rotatable balls 12 and 13 having diametric bores 14 and 15 which provide communication between a common inlet 3 and separate outlets 6 and 7. As the elements are rotated one diametric bore undergoes an increasing throttle cross-section whilst the other undergoes a correspondingly decreasing throttle crosssection, the bores having the same throttle cross-section at one point. As shown, the two valve elements 14, 15 mounted in seats preferably of plastics material, are connected through tongue and groove connections 21, 22 by an intermediate member 20 and operated, e.g. by a handle 19. The device prevents the frame from setting in an oblique position if the resistance to shifting encountered at the roof and floor are different so that the props would tend to extend at different rates. The valves may be controlled automatically in response, e.g. to the inclination of the props.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691920858 DE1920858A1 (en) | 1969-04-24 | 1969-04-24 | Equalization control valve device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1303752A true GB1303752A (en) | 1973-01-17 |
Family
ID=5732193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1981070A Expired GB1303752A (en) | 1969-04-24 | 1970-04-24 |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1920858A1 (en) |
FR (1) | FR2043221A5 (en) |
GB (1) | GB1303752A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2138110A (en) * | 1983-04-13 | 1984-10-17 | Drallim Ind | Improvement in and relating to control valves |
GB2289930A (en) * | 1994-06-01 | 1995-12-06 | Core Ind Inc | Duplex strainer |
RU2570485C2 (en) * | 2013-03-05 | 2015-12-10 | Данфосс А/С | Heat exchanger valve device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2605758B1 (en) * | 1976-02-13 | 1977-07-21 | Hemscheidt Maschf Hermann | CONTROL VALVE FOR HYDRAULICALLY STEPPING STRUCTURE |
DE4321647A1 (en) * | 1993-06-30 | 1995-01-12 | Suspa Compart Ag | Reversing valve |
-
1969
- 1969-04-24 DE DE19691920858 patent/DE1920858A1/en active Pending
-
1970
- 1970-04-13 FR FR7013168A patent/FR2043221A5/fr not_active Expired
- 1970-04-24 GB GB1981070A patent/GB1303752A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2138110A (en) * | 1983-04-13 | 1984-10-17 | Drallim Ind | Improvement in and relating to control valves |
GB2289930A (en) * | 1994-06-01 | 1995-12-06 | Core Ind Inc | Duplex strainer |
GB2289930B (en) * | 1994-06-01 | 1998-01-28 | Core Ind Inc | Duplex strainer |
RU2570485C2 (en) * | 2013-03-05 | 2015-12-10 | Данфосс А/С | Heat exchanger valve device |
Also Published As
Publication number | Publication date |
---|---|
DE1920858A1 (en) | 1970-11-19 |
FR2043221A5 (en) | 1971-02-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2247749A (en) | Stabilizing device for terrestrial vehicles | |
GB1303752A (en) | ||
GB1247730A (en) | Improvements in or relating to spreading implements | |
CA925404A (en) | Hydraulic directional control valve | |
GB1291733A (en) | Set of slides, more particularly for seats of agricultural tractors | |
AU1054270A (en) | Directional control valve | |
GB1107514A (en) | Solid propellent charge | |
GB1145453A (en) | Improved fluid flow control spool valve | |
GB1168512A (en) | Improvements in or relating to Fluid Control Valves | |
GB1199626A (en) | Improvements in or relating to a Multiported Hydraulic Distributor | |
CA930279A (en) | Directional control valve | |
GB1099140A (en) | Dual engine controls | |
AU1669870A (en) | Flow control valves | |
GB1188022A (en) | Fluid Control Valves. | |
CA1008756A (en) | Proportional bypass valve having variable area orifice control means and systems for using same | |
GB1212423A (en) | Improvements in the balancing of rotary members | |
CA921361A (en) | Irrigation flow control valve | |
GB1162205A (en) | Mixing Head | |
GB1302742A (en) | ||
CA837383A (en) | Adjustable metered directional flow control valve arrangement | |
GB1212664A (en) | An automatic hydraulic combining valve arrangement | |
GB1095278A (en) | Improvements in and relating to spectators terraces | |
ES192031U (en) | Cabin for the application and recovery of paint in (Machine-translation by Google Translate, not legally binding) | |
CA805466A (en) | Locking means for flow control valve | |
GB1213826A (en) | A filling material for use in preparing the ground on building sites |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |