GB2101662B - }hydraulically-operated devices} - Google Patents
}hydraulically-operated devices}Info
- Publication number
- GB2101662B GB2101662B GB08219438A GB8219438A GB2101662B GB 2101662 B GB2101662 B GB 2101662B GB 08219438 A GB08219438 A GB 08219438A GB 8219438 A GB8219438 A GB 8219438A GB 2101662 B GB2101662 B GB 2101662B
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydraulically
- operated devices
- operated
- devices
- 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.)
- Expired
Links
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
- E21D23/18—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms
- E21D23/20—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms for sequential movement, e.g. one behind the other
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)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08219438A GB2101662B (en) | 1981-07-16 | 1982-07-05 | }hydraulically-operated devices} |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8121999 | 1981-07-16 | ||
GB08219438A GB2101662B (en) | 1981-07-16 | 1982-07-05 | }hydraulically-operated devices} |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2101662A GB2101662A (en) | 1983-01-19 |
GB2101662B true GB2101662B (en) | 1984-09-05 |
Family
ID=26280151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08219438A Expired GB2101662B (en) | 1981-07-16 | 1982-07-05 | }hydraulically-operated devices} |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2101662B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3304982C2 (en) * | 1982-05-08 | 1984-09-13 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal | Hydraulic control for a walking frame |
DE3546278C1 (en) * | 1985-12-28 | 1987-07-02 | Bergwerksverband Gmbh | Repositioning control for longwall construction |
-
1982
- 1982-07-05 GB GB08219438A patent/GB2101662B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB2101662A (en) | 1983-01-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |