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AU239147B2 - Dual rotation for rock drills - Google Patents
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AU239147B2 - Dual rotation for rock drills - Google Patents

Dual rotation for rock drills

Info

Publication number
AU239147B2
AU239147B2 AU58966/60A AU5896660A AU239147B2 AU 239147 B2 AU239147 B2 AU 239147B2 AU 58966/60 A AU58966/60 A AU 58966/60A AU 5896660 A AU5896660 A AU 5896660A AU 239147 B2 AU239147 B2 AU 239147B2
Authority
AU
Australia
Prior art keywords
rock drills
dual rotation
dual
rotation
drills
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 - Lifetime
Application number
AU58966/60A
Inventor
Clark Curtis and Toimi Antero Parssinen John
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
Filing date
Publication of AU239147B2 publication Critical patent/AU239147B2/en
Application filed by Joy Manufacturing Co filed Critical Joy Manufacturing Co
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

AU58966/60A 1960-03-30 Dual rotation for rock drills Expired - Lifetime AU239147B2 (en)

Publications (1)

Publication Number Publication Date
AU239147B2 true AU239147B2 (en)

Family

ID=

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