GB940731A - Improvements in mining and quarrying apparatus - Google Patents
Improvements in mining and quarrying apparatusInfo
- Publication number
- GB940731A GB940731A GB2682658A GB2682658A GB940731A GB 940731 A GB940731 A GB 940731A GB 2682658 A GB2682658 A GB 2682658A GB 2682658 A GB2682658 A GB 2682658A GB 940731 A GB940731 A GB 940731A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- oil
- valve
- cylinder
- pressure stage
- 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
- 238000005065 mining Methods 0.000 title 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
- E21C37/08—Devices with pistons, plungers, or the like, pressed locally against the wall of the borehole
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Reciprocating Pumps (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
940,731. Mining-apparatus. S. GUREL. Nov. 20, 1959 [Aug. 20, 1958], No. 26826/58. Heading E1F. Breaking-down means comprises a pump operable by fluid pressure, e.g., compressed air, and having a low pressure stage and a high pressure stage with interposed valve means, a hydraulic breaking-down head being coupled directly to the high pressure stage. As shown, the breaking-down head 13 is secured to a high pressure stage 11 separated by manually set, slide-valve means 12 from the low pressure stage 10, the pump plungers 42, 28 are connected respectively to pistons 15, 20. The piston 15 is double acting and works in a cylinder 16 connected through a slide valve 17 with the compressed air supply 48. The slide valve stem 26 has a head 58 which is slidable in the hollow piston rod 28 and acts, at the ends of the reciprocations of the piston 15, to compress one or other of springs 57, 60. When the spring compression overcomes a spring pressed detent the slide valve 17 is moved to reverse the air admission and exhaust and the direction of the piston 15. The piston 15 thus reciprocates as long as the air admission valve 49 is open. The plunger rod 63 is attached to the piston rod 28 and works in a cylinder 68 to suck oil, through a non-return valve 60, from a reservoir cylinder 19 and force it past the spring-loaded valve 70 to the slide valve 74 which is adjustable either to admit the oil from the plunger 63, through the port 77, to the near side of the piston 20, whereby oil in the cylinder 24 is compressed to a still higher pressure by the piston 23, to force oil beneath the jack plungers 14; or to join the ports 77, 81 for the return of oil to the reservoir 19 whilst oil from the plunger 63 is forced through the passages 78 to the top of the jack plungers to return them to retracted condition. The jack plungers are protected by caps 84. A piston 18 is freely slidable on the sleeve 43 to follow up variations in the oil content of the cylinder 19.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2682658A GB940731A (en) | 1958-08-20 | 1958-08-20 | Improvements in mining and quarrying apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2682658A GB940731A (en) | 1958-08-20 | 1958-08-20 | Improvements in mining and quarrying apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB940731A true GB940731A (en) | 1963-10-30 |
Family
ID=10249861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2682658A Expired GB940731A (en) | 1958-08-20 | 1958-08-20 | Improvements in mining and quarrying apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB940731A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2288849A1 (en) * | 1974-10-24 | 1976-05-21 | Villard Andre | Multi-piston hydraulic rock breaker - has pistons fitting in chambers in block sliding outwards from casing |
-
1958
- 1958-08-20 GB GB2682658A patent/GB940731A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2288849A1 (en) * | 1974-10-24 | 1976-05-21 | Villard Andre | Multi-piston hydraulic rock breaker - has pistons fitting in chambers in block sliding outwards from casing |
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