BE493811A - - Google Patents
Info
- Publication number
- BE493811A BE493811A BE493811DA BE493811A BE 493811 A BE493811 A BE 493811A BE 493811D A BE493811D A BE 493811DA BE 493811 A BE493811 A BE 493811A
- Authority
- BE
- Belgium
- Prior art keywords
- piston
- key
- valve
- pump body
- action
- Prior art date
Links
- 239000007788 liquid Substances 0.000 claims description 12
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000003921 oil Substances 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 229940037003 alum Drugs 0.000 description 1
- 239000011805 ball Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
Classifications
-
- 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
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Reciprocating Pumps (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE493811A true BE493811A (de) |
Family
ID=137722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE493811D BE493811A (de) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE493811A (de) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2872147A (en) * | 1952-09-05 | 1959-02-03 | Mining Engineering Co Ltd | Roof supports |
| US2888230A (en) * | 1952-06-16 | 1959-05-26 | Mining Engineering Co Ltd | Roof supports |
| US2888231A (en) * | 1952-05-27 | 1959-05-26 | Mining Engineering Co Ltd | Roof supports |
| DE1123639B (de) * | 1953-06-02 | 1962-02-15 | Bolton & Company Engineers Ltd | Wandernder Strebausbau |
| DE1123640B (de) * | 1957-12-23 | 1962-02-15 | Kloeckner Werke Ag | Doppelt ausfahrbarer hydraulischer Grubenstempel |
| DE1133327B (de) * | 1956-10-29 | 1962-07-19 | Wilhelm Reppel | Mehrfach ausziehbarer hydraulischer Grubenstempel |
| DE1149678B (de) * | 1960-09-15 | 1963-06-06 | Rheinstahl Gmbh Wanheim | Mehrstufiger hydraulischer Grubenstempel |
| DE1153705B (de) * | 1960-10-01 | 1963-09-05 | Rheinstahl Gmbh Wanheim | Hydraulischer Grubenstempel |
| DE1156735B (de) * | 1960-05-03 | 1963-11-07 | Kloeckner Werke Ag | Hydraulischer Grubenstempel |
| DE1167299B (de) * | 1960-09-02 | 1964-04-09 | Houilleres Bassin Du Nord | Hydraulischer Stempel |
-
0
- BE BE493811D patent/BE493811A/fr unknown
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2888231A (en) * | 1952-05-27 | 1959-05-26 | Mining Engineering Co Ltd | Roof supports |
| US2888230A (en) * | 1952-06-16 | 1959-05-26 | Mining Engineering Co Ltd | Roof supports |
| US2872147A (en) * | 1952-09-05 | 1959-02-03 | Mining Engineering Co Ltd | Roof supports |
| DE1123639B (de) * | 1953-06-02 | 1962-02-15 | Bolton & Company Engineers Ltd | Wandernder Strebausbau |
| DE1133327B (de) * | 1956-10-29 | 1962-07-19 | Wilhelm Reppel | Mehrfach ausziehbarer hydraulischer Grubenstempel |
| DE1123640B (de) * | 1957-12-23 | 1962-02-15 | Kloeckner Werke Ag | Doppelt ausfahrbarer hydraulischer Grubenstempel |
| DE1156735B (de) * | 1960-05-03 | 1963-11-07 | Kloeckner Werke Ag | Hydraulischer Grubenstempel |
| DE1167299B (de) * | 1960-09-02 | 1964-04-09 | Houilleres Bassin Du Nord | Hydraulischer Stempel |
| DE1149678B (de) * | 1960-09-15 | 1963-06-06 | Rheinstahl Gmbh Wanheim | Mehrstufiger hydraulischer Grubenstempel |
| DE1153705B (de) * | 1960-10-01 | 1963-09-05 | Rheinstahl Gmbh Wanheim | Hydraulischer Grubenstempel |
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