BE553228A - - Google Patents
Info
- Publication number
- BE553228A BE553228A BE553228DA BE553228A BE 553228 A BE553228 A BE 553228A BE 553228D A BE553228D A BE 553228DA BE 553228 A BE553228 A BE 553228A
- Authority
- BE
- Belgium
Links
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
- E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/18—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the effective cross-section of the working surface of the piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/14—Pumps characterised by muscle-power operation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Details Of Reciprocating Pumps (AREA)
- Transmissions By Endless Flexible Members (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Actuator (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB35219/55A GB802804A (en) | 1955-12-08 | 1955-12-08 | Improvements in or relating to hydraulic pit props |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE553228A true BE553228A (xx) |
Family
ID=10375225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE553228D BE553228A (xx) | 1955-12-08 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE553228A (xx) |
| DE (1) | DE1054402B (xx) |
| FR (1) | FR1164647A (xx) |
| GB (1) | GB802804A (xx) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB962542A (en) * | 1959-08-21 | 1964-07-01 | Acrow Eng Ltd | Improvements in and relating to hydraulic props |
| CN110307021B (zh) * | 2019-07-29 | 2024-01-12 | 石家庄博安煤矿机械制造有限公司 | 一种煤矿用液压支撑装置 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE526791A (xx) * | 1953-02-25 | |||
| NL191038A (xx) * | 1953-09-24 | 1900-01-01 |
-
0
- BE BE553228D patent/BE553228A/xx unknown
-
1955
- 1955-12-08 GB GB35219/55A patent/GB802804A/en not_active Expired
-
1956
- 1956-11-29 DE DEM32499A patent/DE1054402B/de active Pending
- 1956-12-06 FR FR1164647D patent/FR1164647A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB802804A (en) | 1958-10-15 |
| FR1164647A (fr) | 1958-10-13 |
| DE1054402B (de) | 1959-04-09 |