GB1295779A - - Google Patents

Info

Publication number
GB1295779A
GB1295779A GB1295779DA GB1295779A GB 1295779 A GB1295779 A GB 1295779A GB 1295779D A GB1295779D A GB 1295779DA GB 1295779 A GB1295779 A GB 1295779A
Authority
GB
United Kingdom
Prior art keywords
roof
april
advancing mine
bar
displaces
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
Other languages
English (en)
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
Priority claimed from DE19691918048 external-priority patent/DE1918048C3/de
Application filed filed Critical
Publication of GB1295779A publication Critical patent/GB1295779A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • E21D17/0206—Hydraulically operated extension 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)
  • Holders For Apparel And Elements Relating To Apparel (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
GB1295779D 1969-04-09 1970-04-09 Expired GB1295779A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691918048 DE1918048C3 (de) 1969-04-09 Vorpfändvorrichtung

Publications (1)

Publication Number Publication Date
GB1295779A true GB1295779A (enrdf_load_stackoverflow) 1972-11-08

Family

ID=5730704

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1295779D Expired GB1295779A (enrdf_load_stackoverflow) 1969-04-09 1970-04-09

Country Status (2)

Country Link
FR (1) FR2042958A5 (enrdf_load_stackoverflow)
GB (1) GB1295779A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2197678A (en) * 1986-11-21 1988-05-25 Gullick Dobson Ltd Combined forepole and sprag on mine roof support canopy
CN102031985B (zh) * 2009-09-28 2012-09-05 三一重型装备有限公司 迈步自移式支架

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2197678A (en) * 1986-11-21 1988-05-25 Gullick Dobson Ltd Combined forepole and sprag on mine roof support canopy
GB2197678B (en) * 1986-11-21 1990-04-11 Gullick Dobson Ltd Mine roof supports
CN102031985B (zh) * 2009-09-28 2012-09-05 三一重型装备有限公司 迈步自移式支架

Also Published As

Publication number Publication date
DE1918048B2 (de) 1977-05-26
FR2042958A5 (enrdf_load_stackoverflow) 1971-02-12
DE1918048A1 (de) 1970-10-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee