FR2022469A1 - - Google Patents

Info

Publication number
FR2022469A1
FR2022469A1 FR6937541A FR6937541A FR2022469A1 FR 2022469 A1 FR2022469 A1 FR 2022469A1 FR 6937541 A FR6937541 A FR 6937541A FR 6937541 A FR6937541 A FR 6937541A FR 2022469 A1 FR2022469 A1 FR 2022469A1
Authority
FR
France
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.)
Withdrawn
Application number
FR6937541A
Other languages
French (fr)
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.)
DORSON WE ET F Ltd
Original Assignee
DORSON WE ET F Ltd
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 DORSON WE ET F Ltd filed Critical DORSON WE ET F Ltd
Publication of FR2022469A1 publication Critical patent/FR2022469A1/fr
Withdrawn legal-status Critical Current

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
    • E21D23/006—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)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Tents Or Canopies (AREA)
  • Fluid-Pressure Circuits (AREA)
FR6937541A 1968-11-02 1969-10-31 Withdrawn FR2022469A1 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5203468 1968-11-02

Publications (1)

Publication Number Publication Date
FR2022469A1 true FR2022469A1 (enrdf_load_stackoverflow) 1970-07-31

Family

ID=10462375

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6937541A Withdrawn FR2022469A1 (enrdf_load_stackoverflow) 1968-11-02 1969-10-31

Country Status (7)

Country Link
US (1) US3631681A (enrdf_load_stackoverflow)
JP (1) JPS4931162B1 (enrdf_load_stackoverflow)
AT (1) AT293310B (enrdf_load_stackoverflow)
DE (1) DE1954645A1 (enrdf_load_stackoverflow)
ES (1) ES373046A1 (enrdf_load_stackoverflow)
FR (1) FR2022469A1 (enrdf_load_stackoverflow)
GB (1) GB1289299A (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL210760A1 (pl) * 1977-12-13 1979-09-24 Bochumer Eisen Heintzmann Uklad rozrzadu zaworowego przy przesuwnej ramownicy obudowy wyrobisk
DE8318615U1 (de) * 1983-06-28 1983-11-03 Klöckner-Becorit GmbH, 4620 Castrop-Rauxel Richtzylinder fuer den schildausbau
US4679856A (en) * 1983-09-21 1987-07-14 Klockner-Becorit Gmbh Mine self-advancing roof support and method of relocating a mine winning face equipped with self-advancing roof support
GB2164987A (en) * 1984-09-26 1986-04-03 Dowty Mining Equipment Ltd Mine roof supports
US5584611A (en) * 1994-11-22 1996-12-17 Long-Airdox Roof support for underground excavations
US6422962B1 (en) * 2000-04-11 2002-07-23 Litens Automotive Partnership Timing belt tensioner with a backstop device with controlled one-way mechanism
CN100507212C (zh) * 2002-12-17 2009-07-01 迪芬巴赫控制系统股份有限公司 矿山中的工作面支撑装置
CN103557015A (zh) * 2013-08-06 2014-02-05 四川华蓥山广能集团嘉华机械有限责任公司 多伸缩液压支架立柱

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1364412A (fr) * 1963-07-24 1964-06-19 Gewerk Eisenhuette Westfalia Soutènement hydraulique mobile utilisable au fond dans les mines
DE1236451B (de) * 1963-12-21 1967-03-16 Karl Maria Groetschel Dipl Ing Zwischen zwei benachbarte Ausbaueinheiten einsetzbares Leitorgan
GB1079202A (en) * 1964-10-02 1967-08-16 Wild A G & Co Ltd Improvements in or relating to roof support units for mines and the like

Also Published As

Publication number Publication date
ES373046A1 (es) 1971-12-01
AT293310B (de) 1971-10-11
GB1289299A (enrdf_load_stackoverflow) 1972-09-13
DE1954645A1 (de) 1970-05-06
JPS4931162B1 (enrdf_load_stackoverflow) 1974-08-20
US3631681A (en) 1972-01-04

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse