FR878537A - Machine for mining coal and similar minerals - Google Patents

Machine for mining coal and similar minerals

Info

Publication number
FR878537A
FR878537A FR878537DA FR878537A FR 878537 A FR878537 A FR 878537A FR 878537D A FR878537D A FR 878537DA FR 878537 A FR878537 A FR 878537A
Authority
FR
France
Prior art keywords
machine
mining coal
similar minerals
minerals
similar
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.)
Hauhinco Maschinenfabrik G Hausherr Jochums and Co KG
Hauhinco Maschinenfabrik G Hausherr Jochums GmbH and Co KG
Original Assignee
Hauhinco Maschinenfabrik G Hausherr Jochums and Co KG
Hauhinco Maschinenfabrik G Hausherr Jochums GmbH and Co KG
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 Hauhinco Maschinenfabrik G Hausherr Jochums and Co KG, Hauhinco Maschinenfabrik G Hausherr Jochums GmbH and Co KG filed Critical Hauhinco Maschinenfabrik G Hausherr Jochums and Co KG
Application granted granted Critical
Publication of FR878537A publication Critical patent/FR878537A/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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder

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)
FR878537D 1941-02-01 1942-01-16 Machine for mining coal and similar minerals Expired FR878537A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE878537X 1941-02-01

Publications (1)

Publication Number Publication Date
FR878537A true FR878537A (en) 1943-01-22

Family

ID=6818573

Family Applications (1)

Application Number Title Priority Date Filing Date
FR878537D Expired FR878537A (en) 1941-02-01 1942-01-16 Machine for mining coal and similar minerals

Country Status (1)

Country Link
FR (1) FR878537A (en)

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