DE2444776A1 - - Google Patents

Info

Publication number
DE2444776A1
DE2444776A1 DE19742444776 DE2444776A DE2444776A1 DE 2444776 A1 DE2444776 A1 DE 2444776A1 DE 19742444776 DE19742444776 DE 19742444776 DE 2444776 A DE2444776 A DE 2444776A DE 2444776 A1 DE2444776 A1 DE 2444776A1
Authority
DE
Germany
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.)
Granted
Application number
DE19742444776
Other languages
German (de)
Other versions
DE2444776C2 (de
DE2444776B1 (de
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
Priority to DE19742444776 priority Critical patent/DE2444776C2/de
Priority claimed from DE19742444776 external-priority patent/DE2444776C2/de
Priority to AT660875A priority patent/AT338196B/de
Priority to SE7510473A priority patent/SE414214B/xx
Publication of DE2444776A1 publication Critical patent/DE2444776A1/de
Publication of DE2444776B1 publication Critical patent/DE2444776B1/de
Application granted granted Critical
Publication of DE2444776C2 publication Critical patent/DE2444776C2/de
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
    • E21B6/00—Drives for drilling with combined rotary and percussive action

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Details Of Valves (AREA)
  • Check Valves (AREA)
  • Earth Drilling (AREA)
DE19742444776 1974-09-19 1974-09-19 Bohrhammer, insbesondere Stollenbohrhammer Expired DE2444776C2 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19742444776 DE2444776C2 (de) 1974-09-19 Bohrhammer, insbesondere Stollenbohrhammer
AT660875A AT338196B (de) 1974-09-19 1975-08-27 Bohrhammer, insbesondere stollenbohrhammer
SE7510473A SE414214B (sv) 1974-09-19 1975-09-18 Borrhammare, serskilt stollborrhammare

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742444776 DE2444776C2 (de) 1974-09-19 Bohrhammer, insbesondere Stollenbohrhammer

Publications (3)

Publication Number Publication Date
DE2444776A1 true DE2444776A1 (cs) 1975-09-25
DE2444776B1 DE2444776B1 (de) 1975-09-25
DE2444776C2 DE2444776C2 (de) 1976-05-20

Family

ID=

Also Published As

Publication number Publication date
ATA660875A (de) 1976-12-15
SE7510473L (sv) 1976-03-22
DE2444776B1 (de) 1975-09-25
AT338196B (de) 1977-08-10
SE414214B (sv) 1980-07-14

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
8339 Ceased/non-payment of the annual fee