GB772868A - Improvements in or relating to roof supporting appliances for mines and the like - Google Patents
Improvements in or relating to roof supporting appliances for mines and the likeInfo
- Publication number
- GB772868A GB772868A GB1760953A GB1760953A GB772868A GB 772868 A GB772868 A GB 772868A GB 1760953 A GB1760953 A GB 1760953A GB 1760953 A GB1760953 A GB 1760953A GB 772868 A GB772868 A GB 772868A
- Authority
- GB
- United Kingdom
- Prior art keywords
- roof
- props
- hydraulic
- pair
- roof supporting
- 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
- 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
- E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith
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)
- Body Structure For Vehicles (AREA)
Abstract
772,868. Mine roof supports. GULLICK Ltd., and SEAMAN, T. Aug. 23, 1954 [June 25, 1953], No. 17609/53. Class 20(2) In a hydraulic roof support having two relatively movable roof supporting structures 10, 11, coupled together by a double acting hydraulic ram 12 operable to alternately push and pull, respectively, the leading structure 11 and the trailing structure 10 to move the support from one roof supporting position to another, the trailing structure 10 consists of a base or skid 13 carrying four hydraulic pit props 15, one pair on each side, and a roof engaging structure or canopy 16 mounted on the props and including a pair of spaced apart members 16a, and the leading structure 11 consists of an elongated foot or skid 17 slidable into the base 13 between the pairs of props 15 and having thereon one or more hydraulic props 19 provided with a roof supporting girder or headpiece 18 movable longitudinally between the members 16a. In a further modification the roof engaging structure of the trailing section includes a pair of forwardly extending girders 31, Fig. 5, which are adapted to be supported, near their forward ends, by wedges 38 upon a crosshead 37 supported by the props 34 of the leading structure. Specifications 720,361 and 767,501 [Group XXXVII] are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1760953A GB772868A (en) | 1953-06-25 | 1953-06-25 | Improvements in or relating to roof supporting appliances for mines and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1760953A GB772868A (en) | 1953-06-25 | 1953-06-25 | Improvements in or relating to roof supporting appliances for mines and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB772868A true GB772868A (en) | 1957-04-17 |
Family
ID=10098130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1760953A Expired GB772868A (en) | 1953-06-25 | 1953-06-25 | Improvements in or relating to roof supporting appliances for mines and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB772868A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1092411B (en) * | 1958-01-18 | 1960-11-10 | Kronprinz Ag | Catwalk at pit stamps in the steep and semi-steep storage |
| US3425229A (en) * | 1962-11-10 | 1969-02-04 | Karl Maria Groetschel | Mine roof support |
-
1953
- 1953-06-25 GB GB1760953A patent/GB772868A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1092411B (en) * | 1958-01-18 | 1960-11-10 | Kronprinz Ag | Catwalk at pit stamps in the steep and semi-steep storage |
| US3425229A (en) * | 1962-11-10 | 1969-02-04 | Karl Maria Groetschel | Mine roof support |
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