FR2418329A1 - Systeme de commande hydraulique pour dispositif de recouvrement de joint prevu sur le chapeau ou sur le bouclier de foudroyage d'un soutenement marchant - Google Patents
Systeme de commande hydraulique pour dispositif de recouvrement de joint prevu sur le chapeau ou sur le bouclier de foudroyage d'un soutenement marchantInfo
- Publication number
- FR2418329A1 FR2418329A1 FR7901228A FR7901228A FR2418329A1 FR 2418329 A1 FR2418329 A1 FR 2418329A1 FR 7901228 A FR7901228 A FR 7901228A FR 7901228 A FR7901228 A FR 7901228A FR 2418329 A1 FR2418329 A1 FR 2418329A1
- Authority
- FR
- France
- Prior art keywords
- cylinder
- valve
- control system
- low pressure
- hydraulic control
- 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.)
- Granted
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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
- E21D23/26—Hydraulic or pneumatic control
-
- 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
- E21D23/03—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support
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)
- Lifting Devices For Agricultural Implements (AREA)
- Floor Finish (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782808205 DE2808205C2 (de) | 1978-02-25 | 1978-02-25 | Hydraulische Steuerung für eine an der Kappe oder an dem Bruchschild eines Schreitausbaus angeordnete Spaltabdeckung |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2418329A1 true FR2418329A1 (fr) | 1979-09-21 |
FR2418329B1 FR2418329B1 (pl) | 1983-05-27 |
Family
ID=6032957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7901228A Granted FR2418329A1 (fr) | 1978-02-25 | 1979-01-18 | Systeme de commande hydraulique pour dispositif de recouvrement de joint prevu sur le chapeau ou sur le bouclier de foudroyage d'un soutenement marchant |
Country Status (5)
Country | Link |
---|---|
CS (1) | CS219345B2 (pl) |
DE (1) | DE2808205C2 (pl) |
ES (1) | ES478021A1 (pl) |
FR (1) | FR2418329A1 (pl) |
PL (1) | PL119297B1 (pl) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010026977B4 (de) * | 2010-07-13 | 2016-06-02 | Marco Systemanaslyse Und Entwicklung Gmbh | Verfahren zur Schildsteuerung |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE657410A (pl) * | 1963-12-24 | 1965-04-16 | ||
GB1117312A (en) * | 1964-10-16 | 1968-06-19 | Coal Industry Patents Ltd | Self advancing roof supports in inclined mineral seams |
FR2128636A1 (pl) * | 1971-03-05 | 1972-10-20 | Sanyaszati Kutato Inteze | |
DE2350482A1 (de) * | 1973-10-08 | 1975-04-10 | Hemscheidt Maschf Hermann | Hydraulischer schildausbau |
DE2502109A1 (de) * | 1974-01-19 | 1975-07-24 | Dowty Mining Equipment Ltd | Grubendeckenabstuetzung |
-
1978
- 1978-02-25 DE DE19782808205 patent/DE2808205C2/de not_active Expired
-
1979
- 1979-01-10 CS CS24679A patent/CS219345B2/cs unknown
- 1979-01-18 FR FR7901228A patent/FR2418329A1/fr active Granted
- 1979-02-23 ES ES478021A patent/ES478021A1/es not_active Expired
- 1979-02-23 PL PL21364479A patent/PL119297B1/pl unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE657410A (pl) * | 1963-12-24 | 1965-04-16 | ||
GB1117312A (en) * | 1964-10-16 | 1968-06-19 | Coal Industry Patents Ltd | Self advancing roof supports in inclined mineral seams |
FR2128636A1 (pl) * | 1971-03-05 | 1972-10-20 | Sanyaszati Kutato Inteze | |
DE2350482A1 (de) * | 1973-10-08 | 1975-04-10 | Hemscheidt Maschf Hermann | Hydraulischer schildausbau |
DE2502109A1 (de) * | 1974-01-19 | 1975-07-24 | Dowty Mining Equipment Ltd | Grubendeckenabstuetzung |
Also Published As
Publication number | Publication date |
---|---|
ES478021A1 (es) | 1979-12-01 |
DE2808205C2 (de) | 1985-10-10 |
CS219345B2 (en) | 1983-03-25 |
FR2418329B1 (pl) | 1983-05-27 |
DE2808205A1 (de) | 1979-09-06 |
PL213644A1 (pl) | 1979-11-19 |
PL119297B1 (en) | 1981-12-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |