FR773689A - Rock drill - Google Patents

Rock drill

Info

Publication number
FR773689A
FR773689A FR773689DA FR773689A FR 773689 A FR773689 A FR 773689A FR 773689D A FR773689D A FR 773689DA FR 773689 A FR773689 A FR 773689A
Authority
FR
France
Prior art keywords
rock drill
drill
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)
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.)
GEWERKSCHAFT WALLRAM
Original Assignee
GEWERKSCHAFT WALLRAM
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 GEWERKSCHAFT WALLRAM filed Critical GEWERKSCHAFT WALLRAM
Application granted granted Critical
Publication of FR773689A publication Critical patent/FR773689A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
FR773689D 1933-08-19 1934-05-25 Rock drill Expired FR773689A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE773689X 1933-08-19

Publications (1)

Publication Number Publication Date
FR773689A true FR773689A (en) 1934-11-23

Family

ID=1552100

Family Applications (1)

Application Number Title Priority Date Filing Date
FR773689D Expired FR773689A (en) 1933-08-19 1934-05-25 Rock drill

Country Status (1)

Country Link
FR (1) FR773689A (en)

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