CA291992A - Retracing device for rock drill - Google Patents

Retracing device for rock drill

Info

Publication number
CA291992A
CA291992A CA291992A CA291992DA CA291992A CA 291992 A CA291992 A CA 291992A CA 291992 A CA291992 A CA 291992A CA 291992D A CA291992D A CA 291992DA CA 291992 A CA291992 A CA 291992A
Authority
CA
Canada
Prior art keywords
rock drill
retracing
retracing device
drill
rock
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
CA291992A
Other languages
French (fr)
Inventor
Christopher Hansen Charles
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
Publication date
Application granted granted Critical
Publication of CA291992A publication Critical patent/CA291992A/en
Expired legal-status Critical Current

Links

CA291992A Retracing device for rock drill Expired CA291992A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA291992T

Publications (1)

Publication Number Publication Date
CA291992A true CA291992A (en) 1929-08-06

Family

ID=35228804

Family Applications (1)

Application Number Title Priority Date Filing Date
CA291992A Expired CA291992A (en) Retracing device for rock drill

Country Status (1)

Country Link
CA (1) CA291992A (en)

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