FR1321725A - Improvements to hydraulic props for mines - Google Patents
Improvements to hydraulic props for minesInfo
- Publication number
- FR1321725A FR1321725A FR894477A FR894477A FR1321725A FR 1321725 A FR1321725 A FR 1321725A FR 894477 A FR894477 A FR 894477A FR 894477 A FR894477 A FR 894477A FR 1321725 A FR1321725 A FR 1321725A
- Authority
- FR
- France
- Prior art keywords
- mines
- hydraulic props
- props
- hydraulic
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/005—Pistons; Trunk pistons; Plungers obtained by assembling several pieces
- F16J1/006—Pistons; Trunk pistons; Plungers obtained by assembling several pieces of different materials
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
- F16J10/02—Cylinders designed to receive moving pistons or plungers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR894477A FR1321725A (en) | 1961-04-20 | 1962-04-13 | Improvements to hydraulic props for mines |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB62205A DE1229480B (en) | 1961-04-20 | 1961-04-20 | Hydraulic pit ram |
FR894477A FR1321725A (en) | 1961-04-20 | 1962-04-13 | Improvements to hydraulic props for mines |
DE1963B0071366 DE1240018C2 (en) | 1961-04-20 | 1963-04-01 | Hydraulic pit ram |
DEB74658A DE1292604B (en) | 1961-04-20 | 1963-12-13 | Hydraulic pit ram |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1321725A true FR1321725A (en) | 1963-03-22 |
Family
ID=27436604
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR894477A Expired FR1321725A (en) | 1961-04-20 | 1962-04-13 | Improvements to hydraulic props for mines |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1321725A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2474112A1 (en) * | 1980-01-21 | 1981-07-24 | Commercial Shearing | LONG-HOLE CYLINDER THAT CAN SERVE MINE ROOF SUPPORT |
FR2599806A1 (en) * | 1986-06-10 | 1987-12-11 | Douaisis Sabes Stephanoise | Valve for a fluid-operated prop or similar member |
-
1962
- 1962-04-13 FR FR894477A patent/FR1321725A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2474112A1 (en) * | 1980-01-21 | 1981-07-24 | Commercial Shearing | LONG-HOLE CYLINDER THAT CAN SERVE MINE ROOF SUPPORT |
FR2599806A1 (en) * | 1986-06-10 | 1987-12-11 | Douaisis Sabes Stephanoise | Valve for a fluid-operated prop or similar member |
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