FR1371560A - Havers - Google Patents

Havers

Info

Publication number
FR1371560A
FR1371560A FR950088A FR950088A FR1371560A FR 1371560 A FR1371560 A FR 1371560A FR 950088 A FR950088 A FR 950088A FR 950088 A FR950088 A FR 950088A FR 1371560 A FR1371560 A FR 1371560A
Authority
FR
France
Prior art keywords
havers
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
FR950088A
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.)
Coal Industry Patents Ltd
Original Assignee
Coal Industry Patents Ltd
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 Coal Industry Patents Ltd filed Critical Coal Industry Patents Ltd
Priority to FR950088A priority Critical patent/FR1371560A/en
Application granted granted Critical
Publication of FR1371560A publication Critical patent/FR1371560A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C27/00—Machines which completely free the mineral from the seam
    • E21C27/20—Mineral freed by means not involving slitting
    • E21C27/22—Mineral freed by means not involving slitting by rotary drills with breaking-down means, e.g. wedge-shaped drills, i.e. the rotary axis of the tool carrier being substantially perpendicular to the working face, e.g. MARIETTA-type

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR950088A 1963-10-09 1963-10-09 Havers Expired FR1371560A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR950088A FR1371560A (en) 1963-10-09 1963-10-09 Havers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR950088A FR1371560A (en) 1963-10-09 1963-10-09 Havers

Publications (1)

Publication Number Publication Date
FR1371560A true FR1371560A (en) 1964-09-04

Family

ID=8814044

Family Applications (1)

Application Number Title Priority Date Filing Date
FR950088A Expired FR1371560A (en) 1963-10-09 1963-10-09 Havers

Country Status (1)

Country Link
FR (1) FR1371560A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1248589B (en) * 1965-03-11 1967-08-31 Gewerk Eisenhuette Westfalia Extraction and jacking machine
DE2332469A1 (en) * 1972-06-30 1974-01-17 Voest Ag PARTIAL CUTTING MACHINE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1248589B (en) * 1965-03-11 1967-08-31 Gewerk Eisenhuette Westfalia Extraction and jacking machine
DE2332469A1 (en) * 1972-06-30 1974-01-17 Voest Ag PARTIAL CUTTING MACHINE

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