GB758867A - Improvements in cotters for coupling mine-roof support girders to one another - Google Patents

Improvements in cotters for coupling mine-roof support girders to one another

Info

Publication number
GB758867A
GB758867A GB1113554A GB1113554A GB758867A GB 758867 A GB758867 A GB 758867A GB 1113554 A GB1113554 A GB 1113554A GB 1113554 A GB1113554 A GB 1113554A GB 758867 A GB758867 A GB 758867A
Authority
GB
United Kingdom
Prior art keywords
cotter
girder
cotters
april
another
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
GB1113554A
Other languages
English (en)
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.)
LE PROGRES CHARBONNIER PROCHAR
Original Assignee
LE PROGRES CHARBONNIER PROCHAR
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 LE PROGRES CHARBONNIER PROCHAR filed Critical LE PROGRES CHARBONNIER PROCHAR
Publication of GB758867A publication Critical patent/GB758867A/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
    • E21D17/08—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

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)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Connection Of Plates (AREA)
  • Joining Of Building Structures In Genera (AREA)
GB1113554A 1953-04-15 1954-04-15 Improvements in cotters for coupling mine-roof support girders to one another Expired GB758867A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE406561 1953-04-15

Publications (1)

Publication Number Publication Date
GB758867A true GB758867A (en) 1956-10-10

Family

ID=45816025

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1113554A Expired GB758867A (en) 1953-04-15 1954-04-15 Improvements in cotters for coupling mine-roof support girders to one another

Country Status (5)

Country Link
BE (1) BE519224A (enrdf_load_stackoverflow)
DE (1) DE1171383B (enrdf_load_stackoverflow)
FR (1) FR1096149A (enrdf_load_stackoverflow)
GB (1) GB758867A (enrdf_load_stackoverflow)
NL (1) NL89705C (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1279170A (en) * 1970-11-16 1972-06-28 Hunter Douglas Curtain track fittings

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE804317C (de) * 1949-03-22 1951-04-19 Otto Leppak Verfahren zur Schaffung einer stempelfreien Abbaufront beim eisernen Strebausbau
DE835586C (de) * 1949-11-25 1952-04-03 Hans Gerlach Grubenausbau, insbesondere fuer eine stempelfreie Abbaufront
DE933325C (de) * 1952-01-16 1955-09-22 Gutehoffnungshuette Sterkrade Schraegverzahnte Gelenkverbindung

Also Published As

Publication number Publication date
FR1096149A (fr) 1955-06-09
DE1171383B (de) 1964-06-04
NL89705C (enrdf_load_stackoverflow)
BE519224A (enrdf_load_stackoverflow)

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