GB729805A - Improvements relating to pit props - Google Patents
Improvements relating to pit propsInfo
- Publication number
- GB729805A GB729805A GB1452453A GB1452453A GB729805A GB 729805 A GB729805 A GB 729805A GB 1452453 A GB1452453 A GB 1452453A GB 1452453 A GB1452453 A GB 1452453A GB 729805 A GB729805 A GB 729805A
- Authority
- GB
- United Kingdom
- Prior art keywords
- footplate
- prop
- smaller
- larger
- floor
- 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
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
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)
- Floor Finish (AREA)
Abstract
729,805. Pit props. BECORIT-GRUBENAUSBAU GES. May 22, 1953, No. 14524/53. Class 20 (2). A pit prop has two footplates of different size, the smaller footplate 2 being rigidly secured to the bottom 1 of the prop and having a shallow domed surface 4, and the larger footplate 5 having a cavity 6 which will receive the smaller footplate 2 with a clearance at the sides, the larger footplate 5 being detachably secured to the smaller footplate 2 by means of bars 8 which are held by screws 11 upon the upper surface of the footplate 5 and are spaced vertically from the rim 3 of the lower footplate 2 and horizontally from the lower prop member 1. The surface of the cavity 6 has a shape corresponding to the curvature of the surface 4 of the smaller footplate 2, and when the prop is used on a soft floor with the larger footplate 5 attached, relative rocking movement can occur between the prop and the footplate 5. When the prop is used on a hard floor the footplate 5 may be detached and the face 4 of the smaller footplate 2 placed against the floor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1452453A GB729805A (en) | 1953-05-22 | 1953-05-22 | Improvements relating to pit props |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1452453A GB729805A (en) | 1953-05-22 | 1953-05-22 | Improvements relating to pit props |
Publications (1)
Publication Number | Publication Date |
---|---|
GB729805A true GB729805A (en) | 1955-05-11 |
Family
ID=10042757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1452453A Expired GB729805A (en) | 1953-05-22 | 1953-05-22 | Improvements relating to pit props |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB729805A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1207909B (en) * | 1964-06-27 | 1965-12-30 | Hoesch Bergbautechnik G M B H | Stamp foot holder |
US3319382A (en) * | 1964-08-24 | 1967-05-16 | Emhart Corp | Mullion assembly |
US3414227A (en) * | 1966-02-09 | 1968-12-03 | Gewerk Eisenhuette Westfalia | Foot plate for pit props |
US3535071A (en) * | 1967-04-03 | 1970-10-20 | Raymond Bore | Mine props |
-
1953
- 1953-05-22 GB GB1452453A patent/GB729805A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1207909B (en) * | 1964-06-27 | 1965-12-30 | Hoesch Bergbautechnik G M B H | Stamp foot holder |
US3319382A (en) * | 1964-08-24 | 1967-05-16 | Emhart Corp | Mullion assembly |
US3414227A (en) * | 1966-02-09 | 1968-12-03 | Gewerk Eisenhuette Westfalia | Foot plate for pit props |
US3535071A (en) * | 1967-04-03 | 1970-10-20 | Raymond Bore | Mine props |
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