FR584180A - Improvements to coal cutters - Google Patents

Improvements to coal cutters

Info

Publication number
FR584180A
FR584180A FR584180DA FR584180A FR 584180 A FR584180 A FR 584180A FR 584180D A FR584180D A FR 584180DA FR 584180 A FR584180 A FR 584180A
Authority
FR
France
Prior art keywords
coal cutters
cutters
coal
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 FR584180A publication Critical patent/FR584180A/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)
FR584180D 1924-07-30 1924-07-30 Improvements to coal cutters Expired FR584180A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR584180T 1924-07-30

Publications (1)

Publication Number Publication Date
FR584180A true FR584180A (en) 1925-01-31

Family

ID=8959155

Family Applications (1)

Application Number Title Priority Date Filing Date
FR584180D Expired FR584180A (en) 1924-07-30 1924-07-30 Improvements to coal cutters

Country Status (1)

Country Link
FR (1) FR584180A (en)

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