NL80452C - - Google Patents

Info

Publication number
NL80452C
NL80452C NL146595A NL146595A NL80452C NL 80452 C NL80452 C NL 80452C NL 146595 A NL146595 A NL 146595A NL 146595 A NL146595 A NL 146595A NL 80452 C NL80452 C NL 80452C
Authority
NL
Netherlands
Application number
NL146595A
Original Assignee
Joy Mfg Co
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 Joy Mfg Co filed Critical Joy Mfg Co
Application granted granted Critical
Publication of NL80452C publication Critical patent/NL80452C/nl

Links

Classifications

    • 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
    • E21D23/08—Advancing mechanisms
    • E21D23/081—Advancing mechanisms forming parts of the roof supports
    • E21D23/087—Advancing mechanisms forming parts of the roof supports acting directly on the walls of the seam
    • E21D23/088—Advancing mechanisms forming parts of the roof supports acting directly on the walls of the seam by means of wheels, rollers, caterpillars, belts or worm screws
    • 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
    • E21D15/587—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 by means of power accumulators to be pre-charged by rock pressure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
    • 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
    • E21D23/0073—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 with advancing shifting devices connected therewith

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)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
NL146595A 1948-10-06 1949-05-23 NL80452C (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US53070A US2752757A (en) 1948-10-06 1948-10-06 Apparatus for mine roof control

Publications (1)

Publication Number Publication Date
NL80452C true NL80452C (nl) 1956-02-15

Family

ID=21981742

Family Applications (1)

Application Number Title Priority Date Filing Date
NL146595A NL80452C (nl) 1948-10-06 1949-05-23

Country Status (4)

Country Link
US (1) US2752757A (nl)
BE (1) BE489004A (nl)
GB (1) GB715673A (nl)
NL (1) NL80452C (nl)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2888230A (en) * 1952-06-16 1959-05-26 Mining Engineering Co Ltd Roof supports
DE1102075B (de) * 1955-12-23 1961-03-16 Mining Engineering Co Ltd Wandernder Grubenausbau
US2861429A (en) * 1955-12-23 1958-11-25 Mining Engineering Co Ltd Roof supports for mine workings
DE1150639B (de) * 1957-04-13 1963-06-27 Mining Engineering Co Ltd Nachgiebige Tragvorrichtung fuer den Bergbau
DE1193458B (de) * 1958-08-11 1965-05-26 Dobson Ltd W E & F Wandernder Grubenausbau
DE1146464B (de) * 1959-07-18 1963-04-04 Rheinstahl Gmbh Wanheim Mittels Raupen fahrbares Ausbaugestell
GB996137A (en) * 1963-04-22 1965-06-23 Dowty Mining Equipment Ltd Mining apparatus
GB1046269A (en) * 1963-09-03 1966-10-19 Dowty Mining Equipment Ltd Advanceable roof support assembly
US3778108A (en) * 1972-02-29 1973-12-11 Allied Chem Trona mining method
JPS5220302A (en) * 1975-08-08 1977-02-16 Taiheiyo Eng Selfftravelling support for metal and coal mining heading
US4167361A (en) * 1978-08-30 1979-09-11 Mine Safety Appliances Company Temporary mine roof prop
DE3100093A1 (de) * 1981-01-03 1982-08-05 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Vorrichtung zur begrenzung des ausbauwiderstandes eines hydraulischen ausbauschildes
US4312609A (en) * 1980-07-01 1982-01-26 Culley Jr Donnell H Mine roof support system
CN113719306B (zh) * 2021-07-28 2022-05-06 中国矿业大学 一种液压支架智能供液泵站及控制方法

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US81759A (en) * 1868-09-01 George edmund donisthorpe
US76419A (en) * 1868-04-07 Peters
US881609A (en) * 1907-11-06 1908-03-10 Friedrich Nellen Prop for mines.
US942170A (en) * 1908-05-22 1909-12-07 Sylvester M Dunlap Shifting jack-screw.
US1480733A (en) * 1920-04-28 1924-01-15 Morgan Olive Eugenie System and apparatus for mining coal
US1486293A (en) * 1920-06-23 1924-03-11 Morgan Olive Eugenie Mining system and apparatus
US1704866A (en) * 1921-07-01 1929-03-12 Morgan Olive Eugenie Method of mining and mining apparatus
US1736853A (en) * 1924-03-08 1929-11-26 Jeffrey Mfg Co Mining machine
US1588987A (en) * 1924-09-16 1926-06-15 O'toole Edward Method of mining
US1765200A (en) * 1927-11-17 1930-06-17 Bullough Enoch Pit prop
DE512214C (de) * 1928-05-31 1930-11-10 Albert Hamel Verschiebbare Abbaukammer zum versatzlosen Rueckbau
DE543896C (de) * 1930-03-21 1932-02-11 Hermann Klein Auf dem Liegenden fahrbares Geruest mit Raupenbandverzug zum Abfangen des Hangenden
US1998294A (en) * 1933-10-19 1935-04-16 Thomas Mineral Cutting Machine Method of mining
GB511557A (en) * 1938-04-26 1939-08-21 Edward John Leslie Hancock Improvements in or relating to apparatus for use in mining
US2256835A (en) * 1939-06-16 1941-09-23 Mercier Jean Oleopneumatic device
US2313242A (en) * 1940-10-30 1943-03-09 Bendix Aviat Corp Shock strut
US2420666A (en) * 1941-09-12 1947-05-20 Joseph F Joy Hydro-pneumatic recuperator for guns
US2420755A (en) * 1942-12-04 1947-05-20 Joy Mfg Co Apparatus for mining
US2352390A (en) * 1943-05-13 1944-06-27 Everett R Kirkland Hydraulic jack

Also Published As

Publication number Publication date
BE489004A (nl) 1949-05-31
US2752757A (en) 1956-07-03
GB715673A (en) 1954-09-22

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