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FR617662A - Improvements to pneumatic hammers - Google Patents

Improvements to pneumatic hammers

Info

Publication number
FR617662A
FR617662A FR617662DA FR617662A FR 617662 A FR617662 A FR 617662A FR 617662D A FR617662D A FR 617662DA FR 617662 A FR617662 A FR 617662A
Authority
FR
France
Prior art keywords
pneumatic hammers
hammers
pneumatic
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)
Inventor
Georges Haffner
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 FR617662A publication Critical patent/FR617662A/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
    • E21B6/00—Drives for drilling with combined rotary and percussive action
    • E21B6/06—Drives for drilling with combined rotary and percussive action the rotation being intermittent, e.g. obtained by ratchet device
    • E21B6/08—Separate drives for percussion and rotation

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)
FR617662D 1926-05-20 1926-05-20 Improvements to pneumatic hammers Expired FR617662A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR617662T 1926-05-20

Publications (1)

Publication Number Publication Date
FR617662A true FR617662A (en) 1927-02-23

Family

ID=8982449

Family Applications (1)

Application Number Title Priority Date Filing Date
FR617662D Expired FR617662A (en) 1926-05-20 1926-05-20 Improvements to pneumatic hammers

Country Status (1)

Country Link
FR (1) FR617662A (en)

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