GB911079A - Improvements relating to roof support bars for mines - Google Patents
Improvements relating to roof support bars for minesInfo
- Publication number
- GB911079A GB911079A GB315460A GB315460A GB911079A GB 911079 A GB911079 A GB 911079A GB 315460 A GB315460 A GB 315460A GB 315460 A GB315460 A GB 315460A GB 911079 A GB911079 A GB 911079A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bar
- mines
- support bars
- roof support
- worm
- 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
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
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)
- Furnace Charging Or Discharging (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
911,079. Mine roof support bars. GUTEHOFFNUNGSHUTTE STERKRADE A.G. Jan. 28, 1960 [Jan. 28, 1959], No. 3154/60. Class 20 (2). A support bar for mines having a hearing eye 3 at one end and a pivot pin 5 at the other end whereby it may be pivoted to a like bar by pushing the bearing eye from the side into the pivot pin of the other bar is characterized in that said bar is provided with a worm gear segment 7 at one end and a rotatable worm 8 at the other end to permit angular adjustment of one bar relative to another, interengagement of the teeth being effected by a cross member 6 having a cam surface 6<SP>1</SP>. The worm 8 is provided with hexagonal holes 9 for co-operation with a wrench and the bearing eye 3 constitutes an elongated hole defining together with a slot in the pin 5 guide means for said member 6.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG26259A DE1084670B (en) | 1959-01-28 | 1959-01-28 | Articulated connection of pit support caps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB911079A true GB911079A (en) | 1962-11-21 |
Family
ID=7122870
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB315460A Expired GB911079A (en) | 1959-01-28 | 1960-01-28 | Improvements relating to roof support bars for mines |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE607721Q (en) |
DE (1) | DE1084670B (en) |
FR (1) | FR1247061A (en) |
GB (1) | GB911079A (en) |
-
1959
- 1959-01-28 DE DEG26259A patent/DE1084670B/en active Pending
-
1960
- 1960-01-27 FR FR816807A patent/FR1247061A/en not_active Expired
- 1960-01-28 GB GB315460A patent/GB911079A/en not_active Expired
-
1961
- 1961-08-31 BE BE607721A patent/BE607721Q/en active
Also Published As
Publication number | Publication date |
---|---|
BE607721Q (en) | 1961-12-18 |
FR1247061A (en) | 1960-11-25 |
DE1084670B (en) | 1960-07-07 |
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