GB579589A - Improvements in and relating to wedges - Google Patents
Improvements in and relating to wedgesInfo
- Publication number
- GB579589A GB579589A GB2170744A GB2170744A GB579589A GB 579589 A GB579589 A GB 579589A GB 2170744 A GB2170744 A GB 2170744A GB 2170744 A GB2170744 A GB 2170744A GB 579589 A GB579589 A GB 579589A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wedges
- wedge
- slots
- chocks
- mine
- 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
- E21D15/60—Devices for withdrawing props or chocks
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)
- Clamps And Clips (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
579,589. Mine chocks. CHARLTON, T. S., and DUNSTONE, D. Q. Nov. 6, 1944, No. 21707. [Class 20 (ii)] [Also in Groups XXV and XXXIV] Mine chocks incorporate a pair of wedges with a parallel interposed member so that the wedges may move separately or together. Telescoping cylindrical members with enlarged ends 10, 11 for bearing against timber &c. have slots to pass the wedges 12, 13 and taper abutments 16. 17 for them. They are separated by a strip 18 with ends extending into the slots and sides 19 to act as a clip on the wedge 13. The shorter wedge 12 has side flanges 22 that prevent it from passing entirely through the slots and the wedge 13 has upstanding projections to limit the movement of the wedge 12. Rims 23 in the outer chock engage slots in the inner to prevent relative rotation. Two sets of chocks may be united by a non-bearing distance bar and in this case the wedges move in planes at an angle to the bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2170744A GB579589A (en) | 1944-11-06 | 1944-11-06 | Improvements in and relating to wedges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2170744A GB579589A (en) | 1944-11-06 | 1944-11-06 | Improvements in and relating to wedges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB579589A true GB579589A (en) | 1946-08-08 |
Family
ID=10167474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2170744A Expired GB579589A (en) | 1944-11-06 | 1944-11-06 | Improvements in and relating to wedges |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB579589A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2294874A1 (en) * | 2004-09-20 | 2008-04-01 | Encofrados J. Alsina, S.A. | Device to aid the unloading of support elements |
-
1944
- 1944-11-06 GB GB2170744A patent/GB579589A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2294874A1 (en) * | 2004-09-20 | 2008-04-01 | Encofrados J. Alsina, S.A. | Device to aid the unloading of support elements |
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