GB822162A - Improvements relating to hydraulic pit props - Google Patents

Improvements relating to hydraulic pit props

Info

Publication number
GB822162A
GB822162A GB3013457A GB3013457A GB822162A GB 822162 A GB822162 A GB 822162A GB 3013457 A GB3013457 A GB 3013457A GB 3013457 A GB3013457 A GB 3013457A GB 822162 A GB822162 A GB 822162A
Authority
GB
United Kingdom
Prior art keywords
valve
prop
pressure
rod
liquid
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
Application number
GB3013457A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOCHUMER GES fur GRUBENAUSBAU
Original Assignee
BOCHUMER GES fur GRUBENAUSBAU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BOCHUMER GES fur GRUBENAUSBAU filed Critical BOCHUMER GES fur GRUBENAUSBAU
Publication of GB822162A publication Critical patent/GB822162A/en
Expired legal-status Critical Current

Links

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

822,162. Hydraulic pit props. BOCHUMER GESELLSCHAFT FUR GRUBENAUSBAU UND TECHNIK. May 4, 1956 [May 6, 1955], No. 30134/57. Divided out of 822,161. Class 20(2) [Also in Group XXIX] A hydraulic pit prop is provided with a spring-loaded valve 27, Fig. 5, of small flow cross-section opening in the direction of liquid pressure and operable either by the liquid pressure to relieve excess pressure in the prop or manually through a longitudinally displaceable rod 29, 30 to initially release the pressure when the prop is to be withdrawn, the valve 27 being interconnected, with axial play, by the rod 29, 30, with a spring-loaded main release valve 24 which opens in the direction opposite to the pressure in the prop, and can be manually opened by means of the rod 29, 30 after the valve 27 hasfirst been opened to initially release the pressure. The coupling between the rod 29, 30 and the valve 24, which comprises a piston 31 on the rod 30 guided in a closed chamber 32 in the valve 24, permits the valve 24 to open, independently of the valve 27, under the influence of liquid pressure in a liquid supply conduit 35, Fig. 2, adapted to be connected to the valve casing 22 when the prop is to be set, the valve 24 in this case acting as a non-return valve for the liquid being pumped into the prop.
GB3013457A 1955-05-06 1956-05-04 Improvements relating to hydraulic pit props Expired GB822162A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT263755 1955-05-06

Publications (1)

Publication Number Publication Date
GB822162A true GB822162A (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 Before (1)

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

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011101716A2 (en) 2010-02-19 2011-08-25 Council Of Scientific And Industrial Research A device for roof support of underground mine/tunnel

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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
DE1266708B (en) * 1965-12-02 1968-04-25 Kloeckner Werke Ag Hydraulic extension arms with a double-acting back cylinder

Family Cites Families (6)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011101716A2 (en) 2010-02-19 2011-08-25 Council Of Scientific And Industrial Research A device for roof support of underground mine/tunnel

Also Published As

Publication number Publication date
NL6501191A (en) 1965-05-25
BE547581A (en) 1956-11-05
DE1167298B (en) 1964-04-09
NL111780C (en) 1965-09-15
FR1197629A (en) 1959-12-02
DE1207316B (en) 1965-12-23
NL6501190A (en) 1965-05-25
GB822161A (en) 1959-10-21

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