GB822161A - Improvements in or relating to hydraulic pit props and liquid supply systems therefor - Google Patents
Improvements in or relating to hydraulic pit props and liquid supply systems thereforInfo
- Publication number
- GB822161A GB822161A GB1389256A GB1389256A GB822161A GB 822161 A GB822161 A GB 822161A GB 1389256 A GB1389256 A GB 1389256A GB 1389256 A GB1389256 A GB 1389256A GB 822161 A GB822161 A GB 822161A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prop
- pressure
- conduit
- pump
- inner member
- 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
- 239000007788 liquid Substances 0.000 title abstract 3
- 238000012856 packing Methods 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 101100521345 Mus musculus Prop1 gene Proteins 0.000 abstract 1
- 108700017836 Prophet of Pit-1 Proteins 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/06—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising selenium or tellurium in uncombined form other than as impurities in semiconductor bodies of other materials
- H01L21/10—Preliminary treatment of the selenium or tellurium, its application to the foundation plate, or the subsequent treatment of the combination
- H01L21/101—Application of the selenium or tellurium to the foundation plate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
-
- 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
- E21D15/005—Props; Chocks, e.g. made of flexible containers filled with backfilling material characterised by the material
-
- 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
- E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
-
- 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
- E21D15/46—Telescopic props with load-measuring devices; with alarm devices
- E21D15/465—Telescopic props with load-measuring devices; with alarm devices with essential hydraulic or pneumatic details
-
- 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
- E21D15/58—Devices for setting props or chocks
- E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
-
- 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
- E21D15/58—Devices for setting props or chocks
- E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
- E21D15/586—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Safety Valves (AREA)
- Reciprocating Pumps (AREA)
- Ink Jet (AREA)
- Press Drives And Press Lines (AREA)
- Check Valves (AREA)
Abstract
822,161. Hydraulic pit props. BOCHUMER GESELLSCHAFT FUR GRUBENAUSBAU UND TECHNIK. May 4, 1956 [May 6, 1955], No. 13892/56. Class 20(2) An hydraulic pit prop 1, Fig. 1, is initially set by low pressure liquid supplied through a conduit 35a having inserted therein a pump 36, Fig. 6, operable to apply the full setting pressure to the prop. The low pressure water from a supply pipe 34, Fig. 5 (not shown), passes through the conduit 35a, through non-return valves 38, 40 of the pump 36, and then through the conduit 35 and a non-return valve in a valve casing 22 into an annular chamber 7 between the outer prop member 1 and inner prop member 2. From the chamber 7 the water passes through recesses 5 in a guiding ring 4 at the bottom of the inner member 2, into the working space of the prop, causing the prop to extend until the inner member 2 engages the mine roof. The pump 36 is then operated to apply the full setting pressure to the prop. One or more packings 6 are mounted on the inner prop member 2 beneath a closure cap 3. A bore 11 in the inner member 2 is so positioned as to move outside of the cap 3 at a predetermined maximum extension of the prop so that pressure liquid can escape from the working space to prevent the guide ring 4 from bearing against the packings 6. A spring element 12, for example, a rubber band extends along the prop axis between holders 16, 17 rotatably mounted in the lower end of the outer member 1 and in the upper end of the inner member 2 respectively, the element 12 serving to retract the prop when the pressure is released by means of a pressure relief valve in the valve casing 22. Specification 822,162 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT263755 | 1955-05-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB822161A true GB822161A (en) | 1959-10-21 |
Family
ID=25608428
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1389256A Expired GB822161A (en) | 1955-05-06 | 1956-05-04 | Improvements in or relating to hydraulic pit props and liquid supply systems therefor |
GB3013457A Expired GB822162A (en) | 1955-05-06 | 1956-05-04 | Improvements relating to hydraulic pit props |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3013457A Expired GB822162A (en) | 1955-05-06 | 1956-05-04 | Improvements relating to hydraulic pit props |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE547581A (en) |
DE (2) | DE1167298B (en) |
FR (1) | FR1197629A (en) |
GB (2) | GB822161A (en) |
NL (3) | NL111780C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1170353B (en) * | 1960-09-22 | 1964-05-21 | Bwg Bergwerk Walzwerk | Device for setting hydraulic pit lining elements |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1266708B (en) * | 1965-12-02 | 1968-04-25 | Kloeckner Werke Ag | Hydraulic extension arms with a double-acting back cylinder |
PL2536919T3 (en) | 2010-02-19 | 2014-12-31 | Council Scient Ind Res | A device for roof support of underground mine/tunnel |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE871585C (en) * | 1950-01-17 | 1953-03-23 | Edgar Tacke | Hydraulic pit ram |
DE973341C (en) * | 1951-03-13 | 1960-01-28 | Ewald Wiemann Maschf | Valve for hydraulic pit ram |
DE924142C (en) * | 1951-04-08 | 1955-02-28 | Ringfeder Gmbh | Pit stamp |
DE928945C (en) * | 1951-06-09 | 1955-06-16 | Eisenwerk Wanheim G M B H | Adjustable hydraulic pit ram |
DE918562C (en) * | 1951-11-24 | 1954-09-30 | Werner Sogalla Dr Ing | Hydraulic pit ram |
DE904858C (en) * | 1951-12-04 | 1954-02-22 | Wilhelm Reppel | Back and forth pressure intensifier for pneumatic systems |
-
1956
- 1956-04-25 DE DE1956B0039995 patent/DE1167298B/en active Pending
- 1956-04-26 DE DE1956B0040014 patent/DE1207316B/en active Pending
- 1956-05-04 FR FR1197629D patent/FR1197629A/en not_active Expired
- 1956-05-04 GB GB1389256A patent/GB822161A/en not_active Expired
- 1956-05-04 GB GB3013457A patent/GB822162A/en not_active Expired
- 1956-05-05 NL NL206907A patent/NL111780C/xx active
- 1956-05-05 BE BE547581A patent/BE547581A/xx unknown
-
1965
- 1965-01-29 NL NL6501191A patent/NL6501191A/xx unknown
- 1965-01-29 NL NL6501190A patent/NL6501190A/xx unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1170353B (en) * | 1960-09-22 | 1964-05-21 | Bwg Bergwerk Walzwerk | Device for setting hydraulic pit lining elements |
Also Published As
Publication number | Publication date |
---|---|
NL111780C (en) | 1965-09-15 |
DE1207316B (en) | 1965-12-23 |
FR1197629A (en) | 1959-12-02 |
NL6501191A (en) | 1965-05-25 |
BE547581A (en) | 1956-11-05 |
GB822162A (en) | 1959-10-21 |
DE1167298B (en) | 1964-04-09 |
NL6501190A (en) | 1965-05-25 |
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