FR1349080A - Improvements to coal cutters - Google Patents

Improvements to coal cutters

Info

Publication number
FR1349080A
FR1349080A FR927052A FR927052A FR1349080A FR 1349080 A FR1349080 A FR 1349080A FR 927052 A FR927052 A FR 927052A FR 927052 A FR927052 A FR 927052A FR 1349080 A FR1349080 A FR 1349080A
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
FR927052A
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
Crawley Industrial Products Ltd
Original Assignee
Coal Industry Patents Ltd
Crawley Industrial Products 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
Priority claimed from GB9131/62A external-priority patent/GB1027337A/en
Application filed by Coal Industry Patents Ltd, Crawley Industrial Products Ltd filed Critical Coal Industry Patents Ltd
Priority to FR927052A priority Critical patent/FR1349080A/en
Application granted granted Critical
Publication of FR1349080A publication Critical patent/FR1349080A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/58—Machines slitting by drilling hole on hole

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)
FR927052A 1962-03-09 1963-03-06 Improvements to coal cutters Expired FR1349080A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR927052A FR1349080A (en) 1962-03-09 1963-03-06 Improvements to coal cutters

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9131/62A GB1027337A (en) 1962-03-09 1962-03-09 Rotary boring heads for coal cutting machines
FR927052A FR1349080A (en) 1962-03-09 1963-03-06 Improvements to coal cutters

Publications (1)

Publication Number Publication Date
FR1349080A true FR1349080A (en) 1964-01-10

Family

ID=26200120

Family Applications (1)

Application Number Title Priority Date Filing Date
FR927052A Expired FR1349080A (en) 1962-03-09 1963-03-06 Improvements to coal cutters

Country Status (1)

Country Link
FR (1) FR1349080A (en)

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