GB742701A - Improvements in or relating to telescopic pitprops - Google Patents
Improvements in or relating to telescopic pitpropsInfo
- Publication number
- GB742701A GB742701A GB5723/51A GB572351A GB742701A GB 742701 A GB742701 A GB 742701A GB 5723/51 A GB5723/51 A GB 5723/51A GB 572351 A GB572351 A GB 572351A GB 742701 A GB742701 A GB 742701A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wedges
- prop
- flanges
- keys
- pit
- 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
- 229910001234 light alloy Inorganic materials 0.000 abstract 1
- 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
-
- 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
- E21D15/38—Telescopic props with parts held relatively to each other by friction or gripping with longitudinally-divided upper or lower prop parts, e.g. interfitting laminations
-
- 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
- E21D15/50—Component parts or details of props
- E21D15/502—Prop bodies characterised by their shape, e.g. of specified cross-section
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)
- Pressure Welding/Diffusion-Bonding (AREA)
- Braking Arrangements (AREA)
Abstract
742,701. Pit props. SCHMIDT, A. March 9, 1951 [May 10, 1950], No. 5723/51. Class 20(2). The telescoping parts 1, 3 of a pit-prop are locked by independent wedges 8, 9 in slots in a prop lock 2 with or without the interposition of a locking element 6 or 7. The keys 6, 7 are of light alloy and are engaged by a galvanised surface on the wedges 8, 9. The inner prop member 1 may be of double H section, Fig. 4, having brake shoes 15, 16 adapted to be gripped between the flanges of the inner member by operation of wedges 8 acting on both sets of flanges by means of keys 6A. In a modification, Fig. 5, (not shown) each wedge 8 and one key operates on one set of flanges only. For in. stantaneous withdrawal of the prop an eccentric may be provided or two wedges connected by a sleeve passing over the tapered ends.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE742701X | 1950-05-10 | ||
DE776555X | 1953-09-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB742701A true GB742701A (en) | 1956-01-04 |
Family
ID=25947410
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5723/51A Expired GB742701A (en) | 1950-05-10 | 1951-03-09 | Improvements in or relating to telescopic pitprops |
GB26482/54A Expired GB776555A (en) | 1950-05-10 | 1954-09-13 | Pit prop |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB26482/54A Expired GB776555A (en) | 1950-05-10 | 1954-09-13 | Pit prop |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB742701A (en) |
Cited By (2)
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 |
CN102996146A (en) * | 2012-12-28 | 2013-03-27 | 太原科技大学 | Early warning hydraulic prop device |
-
1951
- 1951-03-09 GB GB5723/51A patent/GB742701A/en not_active Expired
-
1954
- 1954-09-13 GB GB26482/54A patent/GB776555A/en not_active Expired
Cited By (3)
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 |
CN102996146A (en) * | 2012-12-28 | 2013-03-27 | 太原科技大学 | Early warning hydraulic prop device |
CN102996146B (en) * | 2012-12-28 | 2016-03-30 | 太原科技大学 | Early warning hydraulic prop device |
Also Published As
Publication number | Publication date |
---|---|
GB776555A (en) | 1957-06-12 |
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