GB847386A - Hydraulic pit prop - Google Patents

Hydraulic pit prop

Info

Publication number
GB847386A
GB847386A GB15551/57A GB1555157A GB847386A GB 847386 A GB847386 A GB 847386A GB 15551/57 A GB15551/57 A GB 15551/57A GB 1555157 A GB1555157 A GB 1555157A GB 847386 A GB847386 A GB 847386A
Authority
GB
United Kingdom
Prior art keywords
prop
pipe
plunger
passage
reservoir
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
GB15551/57A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB847386A publication Critical patent/GB847386A/en
Expired legal-status Critical Current

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
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
    • E21D23/0069—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices without essential advancing shifting devices

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)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)

Abstract

847,386. Hydraulic pit props. NOE, O. May 16, 1957 [May 30, 1956], No. 15551/57. Class 20(2) An hydraulic telescopic pit prop comprising a reservoir 2, 21 in the inner prop member 1, is set by a pump separate from the prop which draws liquid from the prop reservoir 2, 21 by a pipe 7 and forces it by a pipe 8 into the prop pressure chamber 3<SP>1</SP>. The pipes 7, 8 are connected to an adapter having a central plunger 39 Fig. 4, adapted to be forced into a passage 40 in the prop against a spring plunger 83, a sleeve 53 seating against the end of the passage 40 and being forced back into the adapter against spring pressure until projections 61 on the outer casing 54 can be engaged with catches 62 on the prop by turning the casing about its axis. The pipe 7 is connected by grooves 43 in the plug 39 to a pipe 46 leading to the prop reservoir and pipe 8 is connected through a central passage 44 in the plunger 39 to a pipe 10, Fig. 1 connected to the prop pressure chambers 3<SP>1</SP>. When the adapter is removed and the sleeve 53 is returned by spring pressure, passages 42, 57, 58, 56 in the plunger 39 and sleeve and passage 49 in the casing 54 connect pipes 7, 8 together so that fluid from the pump circulates idly. The prop is released by manual operation of the automatic relief valve 12. The pump and adaptor are used to operate a jack for advancing a frame comprising a root bar and props Fig. 6 (not shown).
GB15551/57A 1956-05-30 1957-05-16 Hydraulic pit prop Expired GB847386A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE847386X 1956-05-30

Publications (1)

Publication Number Publication Date
GB847386A true GB847386A (en) 1960-09-07

Family

ID=6775313

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15551/57A Expired GB847386A (en) 1956-05-30 1957-05-16 Hydraulic pit prop

Country Status (2)

Country Link
DE (1) DE1074532B (en)
GB (1) GB847386A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1134647B (en) * 1959-08-28 1962-08-16 Hermann Schwarz Kommanditgesel Device for introducing pressure medium into a pressure medium-operated pit lining element
NL300061A (en) * 1963-08-19
DE1533708C2 (en) * 1965-12-22 1970-04-30 Allinquant, Fernand Stanislas, Sceaux, Seine (Frankreich) Transfer device for hydraulic fluids with automatic locking
DE3141565C1 (en) * 1981-10-20 1983-01-27 Balassagyarmati Fémipari Vállalat, 2660 Balassagyarmat Filling pistol for filling hydraulic units with working fluid

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE899483C (en) * 1953-11-05 Eisenwerk Wanheim G.M.B.H., Duisburg-Wanheim Iron pit stamp
US1450329A (en) * 1916-01-05 1923-04-03 Edmund C Morgan Mine-roof-supporting method and apparatus
GB715018A (en) * 1950-11-23 1954-09-08 Lake & Elliot Ltd Improvements in or relating to hydraulically operated pit props and like supports
DE924142C (en) * 1951-04-08 1955-02-28 Ringfeder Gmbh Pit stamp

Also Published As

Publication number Publication date
DE1074532B (en) 1960-02-04

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