FR819901A - Electrically operated hand hammer - Google Patents

Electrically operated hand hammer

Info

Publication number
FR819901A
FR819901A FR819901DA FR819901A FR 819901 A FR819901 A FR 819901A FR 819901D A FR819901D A FR 819901DA FR 819901 A FR819901 A FR 819901A
Authority
FR
France
Prior art keywords
electrically operated
hand hammer
operated hand
hammer
electrically
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.)
Robert Bosch AG
Robert Bosch GmbH
Original Assignee
Robert Bosch AG
Robert Bosch GmbH
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 Robert Bosch AG, Robert Bosch GmbH filed Critical Robert Bosch AG
Application granted granted Critical
Publication of FR819901A publication Critical patent/FR819901A/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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes

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)
FR819901D 1936-03-03 1937-03-02 Electrically operated hand hammer Expired FR819901A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE819901X 1936-03-03

Publications (1)

Publication Number Publication Date
FR819901A true FR819901A (en) 1937-10-28

Family

ID=6735788

Family Applications (1)

Application Number Title Priority Date Filing Date
FR819901D Expired FR819901A (en) 1936-03-03 1937-03-02 Electrically operated hand hammer

Country Status (1)

Country Link
FR (1) FR819901A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE895881C (en) * 1951-02-15 1953-11-05 Hemscheidt Maschf Hermann Suction head bearing for rock drilling machines, especially for coal mining
US3227230A (en) * 1961-02-21 1966-01-04 Atlas Copco Ab Combination ring and central drill bit drilling equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE895881C (en) * 1951-02-15 1953-11-05 Hemscheidt Maschf Hermann Suction head bearing for rock drilling machines, especially for coal mining
US3227230A (en) * 1961-02-21 1966-01-04 Atlas Copco Ab Combination ring and central drill bit drilling equipment

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