GB876114A - Hydraulic pit prop - Google Patents
Hydraulic pit propInfo
- Publication number
- GB876114A GB876114A GB2911457A GB2911457A GB876114A GB 876114 A GB876114 A GB 876114A GB 2911457 A GB2911457 A GB 2911457A GB 2911457 A GB2911457 A GB 2911457A GB 876114 A GB876114 A GB 876114A
- Authority
- GB
- United Kingdom
- Prior art keywords
- operated
- valve
- spring
- lever
- pressure
- 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
- 239000012530 fluid Substances 0.000 abstract 2
- 101100521345 Mus musculus Prop1 gene Proteins 0.000 abstract 1
- 108700017836 Prophet of Pit-1 Proteins 0.000 abstract 1
- 230000005540 biological transmission Effects 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
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic 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)
- Braking Arrangements (AREA)
- Safety Valves (AREA)
Abstract
876,114. Pit props. BECORIT GRUBENAUSBAU G.m.b.H. Sept. 16, 1957 [Sept. 19, 1956], No. 29114/57. Class 20(2) [Also in Groups XXVI and XXIX] In a hydraulic pit prop 1 the spring 4 of the relief valve 3 is loaded above desired release pressure and the valve is opened by a control mechanism operated by fluid pressure in the pit prop. In Fig. 1 the prop pressure acts against the diaphragm 14 connected to a brake band 17 passing over a drum 18 spring loaded to turn in anticelockwise direction. When a predetermined high pressure is reached the diaphragm lifts to release the brake on the drum which turns and operates the lever 11 to open the valve 3. In Fig. 3 the lever 11 is operated by a spring operated lever 32 operated by a cam 27 rotated by a spring drive 31. The cam is normally locked by a pawl 26 released by a piston 22 acted on by the fluid pressure in the pit prop. Means for loading the spring drive 31 are described (see Group XXVI). In place of the lever 11 hydraulic transmission may be used and instead of a spring drive, pneumatic pressure may be used. The valve may be operated by an electromagnet the circuit of which is controlled by the piston 22 or by an oscillating armature motor. The piston 22 may be connected directly to the valve 3.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB41820A DE1126820B (en) | 1956-09-19 | 1956-09-19 | Hydraulic pit ram |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB876114A true GB876114A (en) | 1961-08-30 |
Family
ID=6966534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2911457A Expired GB876114A (en) | 1956-09-19 | 1957-09-16 | Hydraulic pit prop |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1126820B (en) |
| FR (1) | FR1181945A (en) |
| GB (1) | GB876114A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE526490A (en) * | ||||
| DE950183C (en) * | 1953-02-26 | 1956-10-04 | August Bilstein G M B H | Hydraulic lifting device, in particular for setting pit punches |
-
1956
- 1956-09-19 DE DEB41820A patent/DE1126820B/en active Pending
-
1957
- 1957-09-03 FR FR1181945D patent/FR1181945A/en not_active Expired
- 1957-09-16 GB GB2911457A patent/GB876114A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1181945A (en) | 1959-06-19 |
| DE1126820B (en) | 1962-04-05 |
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