FR545291A - Perforatrice - Google Patents

Perforatrice

Info

Publication number
FR545291A
FR545291A FR545291DA FR545291A FR 545291 A FR545291 A FR 545291A FR 545291D A FR545291D A FR 545291DA FR 545291 A FR545291 A FR 545291A
Authority
FR
France
Prior art keywords
punch
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)
Inventor
Alexander Schmidt
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
Application granted granted Critical
Publication of FR545291A publication Critical patent/FR545291A/fr
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10—Making by using boring or cutting machines
    • E21D9/1053—Making by using boring or cutting machines for making a slit along the perimeter of the tunnel profile, the remaining core being removed subsequently, e.g. by blasting

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR545291D 1921-01-07 1921-12-28 Perforatrice Expired FR545291A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU545291X 1921-01-07

Publications (1)

Publication Number Publication Date
FR545291A true FR545291A (fr) 1922-10-09

Family

ID=10979576

Family Applications (1)

Application Number Title Priority Date Filing Date
FR545291D Expired FR545291A (fr) 1921-01-07 1921-12-28 Perforatrice

Country Status (1)

Country Link
FR (1) FR545291A (fr)

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