CA645735A - Rotary coal drill - Google Patents

Rotary coal drill

Info

Publication number
CA645735A
CA645735A CA645735A CA645735DA CA645735A CA 645735 A CA645735 A CA 645735A CA 645735 A CA645735 A CA 645735A CA 645735D A CA645735D A CA 645735DA CA 645735 A CA645735 A CA 645735A
Authority
CA
Canada
Prior art keywords
coal drill
rotary coal
rotary
drill
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
CA645735A
Inventor
F. Hale Ralph
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.)
Joy Manufacturing Co
Original Assignee
Joy Manufacturing Co
Publication date
Application granted granted Critical
Publication of CA645735A publication Critical patent/CA645735A/en
Expired legal-status Critical Current

Links

CA645735A Rotary coal drill Expired CA645735A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA645735T

Publications (1)

Publication Number Publication Date
CA645735A true CA645735A (en) 1962-07-31

Family

ID=35934391

Family Applications (1)

Application Number Title Priority Date Filing Date
CA645735A Expired CA645735A (en) Rotary coal drill

Country Status (1)

Country Link
CA (1) CA645735A (en)

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