FR422286A - Improvements made to mining machines - Google Patents

Improvements made to mining machines

Info

Publication number
FR422286A
FR422286A FR422286DA FR422286A FR 422286 A FR422286 A FR 422286A FR 422286D A FR422286D A FR 422286DA FR 422286 A FR422286 A FR 422286A
Authority
FR
France
Prior art keywords
improvements made
mining machines
mining
machines
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.)
Ingersoll Rand Co
Original Assignee
Ingersoll Rand Co
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 Ingersoll Rand Co filed Critical Ingersoll Rand Co
Application granted granted Critical
Publication of FR422286A publication Critical patent/FR422286A/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
    • E21C27/28—Mineral freed by means not involving slitting by percussive drills with breaking-down means, e.g. wedge-shaped tools

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)
FR422286D 1910-11-08 1910-11-08 Improvements made to mining machines Expired FR422286A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR422286T 1910-11-08

Publications (1)

Publication Number Publication Date
FR422286A true FR422286A (en) 1911-03-17

Family

ID=1465253

Family Applications (1)

Application Number Title Priority Date Filing Date
FR422286D Expired FR422286A (en) 1910-11-08 1910-11-08 Improvements made to mining machines

Country Status (1)

Country Link
FR (1) FR422286A (en)

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