FR2144637B2 - - Google Patents
Info
- Publication number
- FR2144637B2 FR2144637B2 FR7144585A FR7144585A FR2144637B2 FR 2144637 B2 FR2144637 B2 FR 2144637B2 FR 7144585 A FR7144585 A FR 7144585A FR 7144585 A FR7144585 A FR 7144585A FR 2144637 B2 FR2144637 B2 FR 2144637B2
- Authority
- FR
- France
- 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
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
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/512—Arrangement of valves
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)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Control Of Fluid Pressure (AREA)
- Reciprocating Pumps (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19712132981 DE2132981A1 (de) | 1971-07-02 | 1971-07-02 | Steuergeraet fuer hydraulische grubenausbaugespanne |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2144637A2 FR2144637A2 (https=) | 1973-02-16 |
| FR2144637B2 true FR2144637B2 (https=) | 1974-06-07 |
Family
ID=5812500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7144585A Expired FR2144637B2 (https=) | 1971-07-02 | 1971-12-13 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2132981A1 (https=) |
| FR (1) | FR2144637B2 (https=) |
| GB (1) | GB1390460A (https=) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2745631B1 (de) * | 1977-10-11 | 1979-02-08 | Hemscheidt Maschf Hermann | Mehrfachsteuergeraet fuer hydraulischen Schreitausbau |
-
1971
- 1971-07-02 DE DE19712132981 patent/DE2132981A1/de active Pending
- 1971-12-13 FR FR7144585A patent/FR2144637B2/fr not_active Expired
-
1972
- 1972-05-03 GB GB2061572A patent/GB1390460A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2132981A1 (de) | 1973-01-18 |
| FR2144637A2 (https=) | 1973-02-16 |
| GB1390460A (en) | 1975-04-16 |