GB994903A - Improvements in friction-type pit props - Google Patents
Improvements in friction-type pit propsInfo
- Publication number
- GB994903A GB994903A GB1800662A GB1800662A GB994903A GB 994903 A GB994903 A GB 994903A GB 1800662 A GB1800662 A GB 1800662A GB 1800662 A GB1800662 A GB 1800662A GB 994903 A GB994903 A GB 994903A
- Authority
- GB
- United Kingdom
- Prior art keywords
- friction
- engagement
- pit props
- type pit
- prop
- 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
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Clamps And Clips (AREA)
Abstract
994,903. Telescopic pit props. RHEINSTAHL WANHEIM G.m.b.H. May 10, 1962 [May 12, 1961], No. 18006/62. Heading E1E. In a telescopic pit prop having a friction lock 3, a clamping device such as a wedge 4 is adapted to act on a clamping plate 5 shaped as shown, the arrangement being such that the plate 5 may move the inner prop member 2 about its longitudinal axis into engagement with an abutment 6. The member 2 is provided with two bearing surfaces 2a, 2b for engagement with the members 5, 6 respectively. In a modification, see Figs. 4, 5 and 6 (not shown), two wedges are employed acting on common or separate clamping plates. A friction lining may be provided for the inner prop to rotate therewith.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK0000318 | 1961-05-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB994903A true GB994903A (en) | 1965-06-10 |
Family
ID=7208401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1800662A Expired GB994903A (en) | 1961-05-12 | 1962-05-10 | Improvements in friction-type pit props |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB994903A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011101716A2 (en) | 2010-02-19 | 2011-08-25 | Council Of Scientific And Industrial Research | A device for roof support of underground mine/tunnel |
-
1962
- 1962-05-10 GB GB1800662A patent/GB994903A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011101716A2 (en) | 2010-02-19 | 2011-08-25 | Council Of Scientific And Industrial Research | A device for roof support of underground mine/tunnel |
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