GB353676A - A new or improved prop for mines - Google Patents
A new or improved prop for minesInfo
- Publication number
- GB353676A GB353676A GB2135730A GB2135730A GB353676A GB 353676 A GB353676 A GB 353676A GB 2135730 A GB2135730 A GB 2135730A GB 2135730 A GB2135730 A GB 2135730A GB 353676 A GB353676 A GB 353676A
- Authority
- GB
- United Kingdom
- Prior art keywords
- packing material
- brereton
- prop
- hall
- valve
- 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
- 238000012856 packing Methods 0.000 abstract 4
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
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/18—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure
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)
- Treatment Of Fiber Materials (AREA)
Abstract
353,676. Mine props. BEECH, W. A., Brereton Hall Cottage, and STALEY, J. J., Brereton Hall, both in Brereton, near Rugeley, Staffordshire. July 15, 1930, No. 21357. [Class 20 (ii).] A collapsable pit prop of the type in which an upper member rests on loose packing material in a lower member provided with a valve to release the packing material to allow collapse of the prop, has the outer ends of the members provided with wooden plugs b, c which normally extend beyond the ends of the members and the inner end of the upper member provided with a wooden plug d to rest on the packing material. The valve for controlling release of packing material comprises an apertured rotatable sleeve k.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2135730A GB353676A (en) | 1930-07-15 | 1930-07-15 | A new or improved prop for mines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2135730A GB353676A (en) | 1930-07-15 | 1930-07-15 | A new or improved prop for mines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB353676A true GB353676A (en) | 1931-07-30 |
Family
ID=10161530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2135730A Expired GB353676A (en) | 1930-07-15 | 1930-07-15 | A new or improved prop for mines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB353676A (en) |
-
1930
- 1930-07-15 GB GB2135730A patent/GB353676A/en not_active Expired
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