DE209120C - - Google Patents

Info

Publication number
DE209120C
DE209120C DENDAT209120D DE209120DA DE209120C DE 209120 C DE209120 C DE 209120C DE NDAT209120 D DENDAT209120 D DE NDAT209120D DE 209120D A DE209120D A DE 209120DA DE 209120 C DE209120 C DE 209120C
Authority
DE
Germany
Prior art keywords
sheath
tubes
concrete
held together
longitudinal ribs
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.)
Active
Application number
DENDAT209120D
Other languages
German (de)
English (en)
Publication of DE209120C publication Critical patent/DE209120C/de
Active legal-status Critical Current

Links

Classifications

    • 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
    • E21D15/02—Non-telescopic props

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
DENDAT209120D Active DE209120C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Publications (1)

Publication Number Publication Date
DE209120C true DE209120C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=471108

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT209120D Active DE209120C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Country Status (1)

Country Link
DE (1) DE209120C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028496A1 (en) * 1979-11-02 1981-05-13 Mine Support Systems (Proprietary) Limited Timber prop

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028496A1 (en) * 1979-11-02 1981-05-13 Mine Support Systems (Proprietary) Limited Timber prop

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