NL229755A - - Google Patents
Info
- Publication number
- NL229755A NL229755A NL229755DA NL229755A NL 229755 A NL229755 A NL 229755A NL 229755D A NL229755D A NL 229755DA NL 229755 A NL229755 A NL 229755A
- Authority
- NL
- Netherlands
Links
Classifications
-
- 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
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/517—Extension elements
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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
- E21D15/50—Component parts or details of props
- E21D15/52—Extensible units located above or below standard props
- E21D15/523—Extensible units located above or below standard props with hydraulic or pneumatic control
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DESCH22502A DE1129439B (en) | 1957-07-20 | 1957-07-20 | Flexible support body for the pit construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL229755A true NL229755A (en) |
Family
ID=7429341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL229755D NL229755A (en) | 1957-07-20 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1129439B (en) |
| NL (1) | NL229755A (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE48870C (en) * | F. WOLLANKY und A. KOWASTCH in Beuthen O.-Schl | Grave stamp | ||
| DE800392C (en) * | 1949-04-08 | 1950-11-02 | Gewerk Eisenhuette Westfalia | Hydraulic pit ram |
| FR1013518A (en) * | 1949-10-15 | 1952-07-30 | Support for props | |
| FR1006760A (en) * | 1949-10-15 | 1952-04-28 | hydraulic prop without individual pump | |
| BE494572A (en) * | 1949-12-08 | |||
| US2691503A (en) * | 1950-03-18 | 1954-10-12 | Goodman Mfg Co | Mine prop |
| GB767626A (en) * | 1953-11-02 | 1957-02-06 | Stamicarbon | Improvements in and relating to the erection of pit props |
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0
- NL NL229755D patent/NL229755A/xx unknown
-
1957
- 1957-07-20 DE DESCH22502A patent/DE1129439B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1129439B (en) | 1962-05-17 |