DE2212993A1 - - Google Patents

Info

Publication number
DE2212993A1
DE2212993A1 DE19722212993 DE2212993A DE2212993A1 DE 2212993 A1 DE2212993 A1 DE 2212993A1 DE 19722212993 DE19722212993 DE 19722212993 DE 2212993 A DE2212993 A DE 2212993A DE 2212993 A1 DE2212993 A1 DE 2212993A1
Authority
DE
Germany
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.)
Granted
Application number
DE19722212993
Other languages
German (de)
Other versions
DE2212993C2 (en
DE2212993B1 (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
Application filed filed Critical
Priority to DE19722212993 priority Critical patent/DE2212993C2/en
Publication of DE2212993A1 publication Critical patent/DE2212993A1/de
Publication of DE2212993B1 publication Critical patent/DE2212993B1/en
Application granted granted Critical
Publication of DE2212993C2 publication Critical patent/DE2212993C2/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14—Lining predominantly with metal
    • E21D11/34—Joints between vertical props and horizontal top bars

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
DE19722212993 1972-03-17 1972-03-17 Safety shoe for the door frame extension made of steel profiles in underground operation Expired DE2212993C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19722212993 DE2212993C2 (en) 1972-03-17 1972-03-17 Safety shoe for the door frame extension made of steel profiles in underground operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722212993 DE2212993C2 (en) 1972-03-17 1972-03-17 Safety shoe for the door frame extension made of steel profiles in underground operation

Publications (3)

Publication Number Publication Date
DE2212993A1 true DE2212993A1 (en) 1973-03-01
DE2212993B1 DE2212993B1 (en) 1973-03-01
DE2212993C2 DE2212993C2 (en) 1973-09-20

Family

ID=5839252

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19722212993 Expired DE2212993C2 (en) 1972-03-17 1972-03-17 Safety shoe for the door frame extension made of steel profiles in underground operation

Country Status (1)

Country Link
DE (1) DE2212993C2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3237968A1 (en) * 1982-10-13 1984-04-19 Lorenz-Polygon-Ausbau Gmbh, 4600 Dortmund Cap shoe for the steel support system in underground operation as a connection element for I-section support segments

Also Published As

Publication number Publication date
DE2212993C2 (en) 1973-09-20
DE2212993B1 (en) 1973-03-01

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
8340 Patent of addition ceased/non-payment of fee of main patent