BE568439A - - Google Patents
Info
- Publication number
- BE568439A BE568439A BE568439DA BE568439A BE 568439 A BE568439 A BE 568439A BE 568439D A BE568439D A BE 568439DA BE 568439 A BE568439 A BE 568439A
- Authority
- BE
- Belgium
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
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- 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
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- 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
- E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
- E21D23/0069—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices without essential advancing shifting devices
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- 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
- E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
- E21D23/0073—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices with advancing shifting devices connected therewith
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Fluid-Driven Valves (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1832157A GB890644A (en) | 1957-06-11 | 1957-06-11 | Improvements in or relating to hydraulic jacks, pit props or the like |
Publications (1)
Publication Number | Publication Date |
---|---|
BE568439A true BE568439A (pt) |
Family
ID=10110475
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE568439D BE568439A (pt) | 1957-06-11 |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE568439A (pt) |
DE (1) | DE1211113B (pt) |
FR (1) | FR1207456A (pt) |
GB (1) | GB890644A (pt) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5275086A (en) * | 1992-08-27 | 1994-01-04 | Unlimited Solutions, Inc. | Fluid actuator with internal pressure relief valve |
CN108862088B (zh) * | 2018-08-21 | 2023-07-18 | 九江消防装备有限公司 | 一种电动撑顶器 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE808785C (de) * | 1948-10-02 | 1951-07-19 | Hermann Wolf G M B H | Verfahren und Form zur Herstellung von Kunststofformlingen mit Einlagen aus Metall o. dgl., beispielsweise von Brillen-Hakenbuegeln aus thermoplastischen Kunststoffen mit Drahteinlage |
DE871585C (de) * | 1950-01-17 | 1953-03-23 | Edgar Tacke | Hydraulischer Grubenstempel |
DE918562C (de) * | 1951-11-24 | 1954-09-30 | Werner Sogalla Dr Ing | Hydraulischer Grubenstempel |
LU34334A1 (pt) * | 1955-04-25 |
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0
- BE BE568439D patent/BE568439A/xx unknown
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1957
- 1957-06-11 GB GB1832157A patent/GB890644A/en not_active Expired
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1958
- 1958-06-07 DE DED28261A patent/DE1211113B/de active Pending
- 1958-06-11 FR FR1207456D patent/FR1207456A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB890644A (en) | 1962-03-07 |
DE1211113B (de) | 1966-02-24 |
FR1207456A (fr) | 1960-02-17 |