NL6600841A - - Google Patents
Info
- Publication number
- NL6600841A NL6600841A NL6600841A NL6600841A NL6600841A NL 6600841 A NL6600841 A NL 6600841A NL 6600841 A NL6600841 A NL 6600841A NL 6600841 A NL6600841 A NL 6600841A NL 6600841 A NL6600841 A NL 6600841A
- Authority
- NL
- Netherlands
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D23/18—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D23/12—Control, e.g. using remote control
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D23/12—Control, e.g. using remote control
- E21D23/14—Effecting automatic sequential movement of supports, e.g. one behind the other
- E21D23/148—Wireless transmission of signals or commands
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
- H01H43/10—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed
- H01H43/16—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed stopping automatically after a predetermined plurality of cycles of operation
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)
- Computer Networks & Wireless Communication (AREA)
- Fluid-Pressure Circuits (AREA)
- Earth Drilling (AREA)
- Selective Calling Equipment (AREA)
- Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEG0042622 | 1965-01-21 | ||
| DEG42952A DE1201286B (en) | 1965-01-21 | 1965-02-27 | Retractable hydraulic longwall construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6600841A true NL6600841A (en) | 1966-07-22 |
Family
ID=25978659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6600841A NL6600841A (en) | 1965-01-21 | 1966-01-21 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3434389A (en) |
| BE (1) | BE675336A (en) |
| DE (1) | DE1201286B (en) |
| FR (1) | FR1464327A (en) |
| GB (1) | GB1111605A (en) |
| NL (1) | NL6600841A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1583072B1 (en) * | 1967-10-18 | 1970-01-15 | Bergwerksverband Gmbh | Circuit, especially for controlling support frames or jacks for hydraulic longwall mining in underground mining |
| GB1295079A (en) * | 1969-05-28 | 1972-11-01 | ||
| SU797601A3 (en) * | 1970-08-04 | 1981-01-15 | Геверкшафт Эйзенхютте Вестфалия (Фирма) | Hydraulic device for control of displaceable support sections in mines |
| DE2250296C3 (en) * | 1972-10-13 | 1978-03-16 | Gewerkschaft Eisenhuette Westfalia, 4670 Luenen | Knife shield propulsion device for propelling underground cavities, such as in particular tunnels, tunnels and the like |
| GB1571503A (en) * | 1976-01-24 | 1980-07-16 | Dowty Mining Equipment Ltd | Longwall mining apparatus |
| GB2142074B (en) * | 1983-06-21 | 1987-04-23 | Dobson Park Ind | Control of mine roof supports |
| GB2153971B (en) * | 1984-02-08 | 1988-01-13 | Dobson Park Ind | Valve assembly |
| DE3404302C1 (en) * | 1984-02-08 | 1985-06-05 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal | Control device for a hydraulic stepping frame |
| CN101871354A (en) * | 2010-06-04 | 2010-10-27 | 中煤北京煤矿机械有限责任公司 | Large-step continuous supporting type forepole and forepole moving method thereof |
| CN101864975B (en) * | 2010-06-04 | 2012-06-27 | 中煤北京煤矿机械有限责任公司 | Rear frame-to-front frame type continuous supporting advanced frame and frame moving method thereof |
| DE102011012655B4 (en) * | 2011-02-28 | 2015-09-24 | Kruno Pranjic | Method for operating an underground hydraulic walking structure |
| CN103114867B (en) * | 2013-02-22 | 2015-07-22 | 广州日滨科技发展有限公司 | Automatic straightening method and system for hydraulic supports and scraper conveyors of fully-mechanized coal mining working faces |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB961225A (en) * | 1961-06-12 | 1964-06-17 | Electro Hydraulics Ltd | Hydraulically operated advancing roof support systems |
| GB959492A (en) * | 1961-11-21 | 1964-06-03 | Dowty Technical Developements | Mining apparatus |
-
1965
- 1965-02-27 DE DEG42952A patent/DE1201286B/en active Pending
-
1966
- 1966-01-06 FR FR44985A patent/FR1464327A/en not_active Expired
- 1966-01-19 BE BE675336D patent/BE675336A/xx unknown
- 1966-01-20 GB GB2640/66A patent/GB1111605A/en not_active Expired
- 1966-01-21 NL NL6600841A patent/NL6600841A/xx unknown
-
1967
- 1967-09-29 US US671896A patent/US3434389A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR1464327A (en) | 1966-12-30 |
| BE675336A (en) | 1966-07-19 |
| DE1608504B1 (en) | 1970-09-24 |
| US3434389A (en) | 1969-03-25 |
| DE1201286B (en) | 1965-09-23 |
| GB1111605A (en) | 1968-05-01 |