DE206295C - - Google Patents

Info

Publication number
DE206295C
DE206295C DENDAT206295D DE206295DA DE206295C DE 206295 C DE206295 C DE 206295C DE NDAT206295 D DENDAT206295 D DE NDAT206295D DE 206295D A DE206295D A DE 206295DA DE 206295 C DE206295 C DE 206295C
Authority
DE
Germany
Prior art keywords
linkage
attached
elastic
counterweights
notch
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
DENDAT206295D
Other languages
German (de)
English (en)
Publication of DE206295C publication Critical patent/DE206295C/de
Active 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
    • E21B1/00—Percussion drilling
    • E21B1/02—Surface drives for drop hammers or percussion drilling, e.g. with a cable

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)
  • Handcart (AREA)
DENDAT206295D Active DE206295C (enrdf_load_html_response)

Publications (1)

Publication Number Publication Date
DE206295C true DE206295C (enrdf_load_html_response)

Family

ID=468472

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT206295D Active DE206295C (enrdf_load_html_response)

Country Status (1)

Country Link
DE (1) DE206295C (enrdf_load_html_response)

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