BE657029A - - Google Patents
Info
- Publication number
- BE657029A BE657029A BE657029A BE657029A BE657029A BE 657029 A BE657029 A BE 657029A BE 657029 A BE657029 A BE 657029A BE 657029 A BE657029 A BE 657029A BE 657029 A BE657029 A BE 657029A
- Authority
- BE
- Belgium
Links
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
-
- 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
-
- 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
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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)
- 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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4921863A GB1111660A (en) | 1963-12-12 | 1963-12-12 | Improvements relating to roof support units |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE657029A true BE657029A (xx) | 1965-04-01 |
Family
ID=10451584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE657029A BE657029A (xx) | 1963-12-12 | 1964-12-11 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE657029A (xx) |
| GB (1) | GB1111660A (xx) |
| NL (1) | NL6414456A (xx) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2550830A1 (fr) * | 1983-08-19 | 1985-02-22 | Pernaton Andre | Commande distante electrique et autonome de systemes hydrauliques en atmosphere explosible |
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1963
- 1963-12-12 GB GB4921863A patent/GB1111660A/en not_active Expired
-
1964
- 1964-12-11 BE BE657029A patent/BE657029A/xx unknown
- 1964-12-11 NL NL6414456A patent/NL6414456A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1111660A (en) | 1968-05-01 |
| NL6414456A (xx) | 1965-06-14 |