GB1054630A - - Google Patents
Info
- Publication number
- GB1054630A GB1054630A GB1054630DA GB1054630A GB 1054630 A GB1054630 A GB 1054630A GB 1054630D A GB1054630D A GB 1054630DA GB 1054630 A GB1054630 A GB 1054630A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prop
- line
- jack
- valve
- fluid
- 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.)
- Active
Links
- 239000012530 fluid Substances 0.000 abstract 5
- 239000003245 coal Substances 0.000 abstract 2
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- 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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3821362 | 1962-10-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1054630A true GB1054630A (de) |
Family
ID=10401997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1054630D Active GB1054630A (de) | 1962-10-09 |
Country Status (3)
Country | Link |
---|---|
US (1) | US3244078A (de) |
DE (1) | DE1220368B (de) |
GB (1) | GB1054630A (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3321094A (en) * | 1965-06-11 | 1967-05-23 | Int Harvester Co | Control for materials handling apparatus |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1069548B (de) * | 1959-11-26 | |||
US1231628A (en) * | 1915-05-03 | 1917-07-03 | Westinghouse Electric & Mfg Co | Potential-regulator. |
US2348460A (en) * | 1941-08-19 | 1944-05-09 | Crane Co | Combined hand and hydraulic valve operator |
US2607197A (en) * | 1949-08-06 | 1952-08-19 | Keller Tool Co | Sequential motor operation under control of individual, fluid actuated, relieved pressure valves |
US3120105A (en) * | 1959-09-25 | 1964-02-04 | Coal Industry Patents Ltd | Self-advancing mine roof supports |
US3043277A (en) * | 1960-07-20 | 1962-07-10 | Carlson Martin | Hydraulic door operator system and control means therefor |
-
0
- GB GB1054630D patent/GB1054630A/en active Active
-
1963
- 1963-10-03 US US313625A patent/US3244078A/en not_active Expired - Lifetime
- 1963-10-03 DE DEC31043A patent/DE1220368B/de active Pending
Also Published As
Publication number | Publication date |
---|---|
US3244078A (en) | 1966-04-05 |
DE1220368B (de) | 1966-07-07 |
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