FR38830E - Improvements to mechanical backfillers - Google Patents
Improvements to mechanical backfillersInfo
- Publication number
- FR38830E FR38830E FR38830DA FR38830E FR 38830 E FR38830 E FR 38830E FR 38830D A FR38830D A FR 38830DA FR 38830 E FR38830 E FR 38830E
- Authority
- FR
- France
- Prior art keywords
- backfillers
- mechanical
- mechanical backfillers
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/06—Filling-up mechanically
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR38830T | 1930-02-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR38830E true FR38830E (en) | 1931-07-31 |
Family
ID=8675291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR38830D Expired FR38830E (en) | 1930-02-11 | 1930-02-11 | Improvements to mechanical backfillers |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR38830E (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2763436A (en) * | 1951-12-29 | 1956-09-18 | Jeffrey Mfg Co | Underground mechanical crusher and stower |
-
1930
- 1930-02-11 FR FR38830D patent/FR38830E/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2763436A (en) * | 1951-12-29 | 1956-09-18 | Jeffrey Mfg Co | Underground mechanical crusher and stower |
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