CA291790A - Tiroir de perforatrice a roc - Google Patents

Tiroir de perforatrice a roc

Info

Publication number
CA291790A
CA291790A CA291790A CA291790DA CA291790A CA 291790 A CA291790 A CA 291790A CA 291790 A CA291790 A CA 291790A CA 291790D A CA291790D A CA 291790DA CA 291790 A CA291790 A CA 291790A
Authority
CA
Canada
Prior art keywords
valve
rock drills
drills
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
CA291790A
Other languages
English (en)
Inventor
Beam Lear Earl
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 CA291790A publication Critical patent/CA291790A/fr
Expired legal-status Critical Current

Links

CA291790A Tiroir de perforatrice a roc Expired CA291790A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA291790T

Publications (1)

Publication Number Publication Date
CA291790A true CA291790A (fr) 1929-07-30

Family

ID=35228602

Family Applications (1)

Application Number Title Priority Date Filing Date
CA291790A Expired CA291790A (fr) Tiroir de perforatrice a roc

Country Status (1)

Country Link
CA (1) CA291790A (fr)

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