GB1182925A - Improvements in or relating to Mine Roof Supports. - Google Patents
Improvements in or relating to Mine Roof Supports.Info
- Publication number
- GB1182925A GB1182925A GB5657066A GB5657066A GB1182925A GB 1182925 A GB1182925 A GB 1182925A GB 5657066 A GB5657066 A GB 5657066A GB 5657066 A GB5657066 A GB 5657066A GB 1182925 A GB1182925 A GB 1182925A
- Authority
- GB
- United Kingdom
- Prior art keywords
- levers
- mine roof
- arrangement
- canopy
- relating
- 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
- E21D23/0047—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor without essential shifting 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)
- Tents Or Canopies (AREA)
Abstract
1,182,925. Mine roof support chocks. GULLICK DOBSON Ltd. 20 Nov., 1967 [16 Dec.. 1966], No. 56570/66. Heading E1P. In a mine roof support chock comprising a base 10 and a canopy 11 extension is effected by a scissors, lazy-tongs or like arrangement of interpivoting levers 12, 15 which are actuated by at least one single- or double-acting jack 23. The levers have a pivotal relationship as shown including a lost-motion arrangement 14, 17, the levers being pivoted at their upper ends to a beam 18 which in turn is connected to the canopy 11 by a pivotal link 19. The levers may be provided with flush guards such as 26 and the chock have an advancing jack. For a slightly modified arrangement of levers to give greater mechanical advantage, Figs. 5 and 6 (not shown) should be referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5657066A GB1182925A (en) | 1966-12-16 | 1966-12-16 | Improvements in or relating to Mine Roof Supports. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5657066A GB1182925A (en) | 1966-12-16 | 1966-12-16 | Improvements in or relating to Mine Roof Supports. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1182925A true GB1182925A (en) | 1970-03-04 |
Family
ID=10476963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5657066A Expired GB1182925A (en) | 1966-12-16 | 1966-12-16 | Improvements in or relating to Mine Roof Supports. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1182925A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2622208A1 (en) * | 1976-05-19 | 1977-12-01 | Bochumer Eisen Heintzmann | EXPANSION TRACK |
| GB2136040A (en) * | 1983-03-08 | 1984-09-12 | Dobson Park Ind | Pivotal linkage of a mine roof support |
| GB2150192A (en) * | 1983-11-16 | 1985-06-26 | Dobson Park Ind | Mine roof support |
-
1966
- 1966-12-16 GB GB5657066A patent/GB1182925A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2622208A1 (en) * | 1976-05-19 | 1977-12-01 | Bochumer Eisen Heintzmann | EXPANSION TRACK |
| GB2136040A (en) * | 1983-03-08 | 1984-09-12 | Dobson Park Ind | Pivotal linkage of a mine roof support |
| GB2150192A (en) * | 1983-11-16 | 1985-06-26 | Dobson Park Ind | Mine roof support |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |