FR492187A - Improvements in rock drills - Google Patents

Improvements in rock drills

Info

Publication number
FR492187A
FR492187A FR492187DA FR492187A FR 492187 A FR492187 A FR 492187A FR 492187D A FR492187D A FR 492187DA FR 492187 A FR492187 A FR 492187A
Authority
FR
France
Prior art keywords
rock drills
drills
rock
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
French (fr)
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 FR492187A publication Critical patent/FR492187A/en
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
    • E21D9/106—Making by using boring or cutting machines with percussive tools, e.g. pick-hammers

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)
FR492187D 1916-08-28 1916-08-28 Improvements in rock drills Expired FR492187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR492187T 1916-08-28

Publications (1)

Publication Number Publication Date
FR492187A true FR492187A (en) 1919-07-01

Family

ID=1528099

Family Applications (1)

Application Number Title Priority Date Filing Date
FR492187D Expired FR492187A (en) 1916-08-28 1916-08-28 Improvements in rock drills

Country Status (1)

Country Link
FR (1) FR492187A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2307122A1 (en) * 1975-04-08 1976-11-05 United Kingdom Government HYDRAULIC PERCUSSION DEVICE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2307122A1 (en) * 1975-04-08 1976-11-05 United Kingdom Government HYDRAULIC PERCUSSION DEVICE

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