FR627647A - Improvements to shearers - Google Patents

Improvements to shearers

Info

Publication number
FR627647A
FR627647A FR627647DA FR627647A FR 627647 A FR627647 A FR 627647A FR 627647D A FR627647D A FR 627647DA FR 627647 A FR627647 A FR 627647A
Authority
FR
France
Prior art keywords
shearers
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.)
Jeffrey Manufacturing Co
Original Assignee
Jeffrey Manufacturing 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 Jeffrey Manufacturing Co filed Critical Jeffrey Manufacturing Co
Application granted granted Critical
Publication of FR627647A publication Critical patent/FR627647A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C31/00—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam

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)
FR627647D 1927-01-17 1927-01-17 Improvements to shearers Expired FR627647A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR627647T 1927-01-17

Publications (1)

Publication Number Publication Date
FR627647A true FR627647A (en) 1927-10-08

Family

ID=8989162

Family Applications (1)

Application Number Title Priority Date Filing Date
FR627647D Expired FR627647A (en) 1927-01-17 1927-01-17 Improvements to shearers

Country Status (1)

Country Link
FR (1) FR627647A (en)

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