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 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 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 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
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 (xx) |
Family
ID=10110475
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE568439D BE568439A (xx) | 1957-06-11 |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE568439A (xx) |
DE (1) | DE1211113B (xx) |
FR (1) | FR1207456A (xx) |
GB (1) | GB890644A (xx) |
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 |
BE547272A (xx) * | 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 |
---|---|
FR1207456A (fr) | 1960-02-17 |
GB890644A (en) | 1962-03-07 |
DE1211113B (de) | 1966-02-24 |