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AU492055B2 - Combination rotary and percussion drill bit - Google Patents
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AU492055B2 - Combination rotary and percussion drill bit - Google Patents

Combination rotary and percussion drill bit

Info

Publication number
AU492055B2
AU492055B2 AU74081/74A AU7408174A AU492055B2 AU 492055 B2 AU492055 B2 AU 492055B2 AU 74081/74 A AU74081/74 A AU 74081/74A AU 7408174 A AU7408174 A AU 7408174A AU 492055 B2 AU492055 B2 AU 492055B2
Authority
AU
Australia
Prior art keywords
drill bit
percussion drill
combination rotary
rotary
combination
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
AU74081/74A
Other versions
AU7408174A (en
Inventor
C. Skidmore Sam
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.)
Individual
Original Assignee
Individual
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 US405115A external-priority patent/US3885638A/en
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of AU492055B2 publication Critical patent/AU492055B2/en
Publication of AU7408174A publication Critical patent/AU7408174A/en
Expired legal-status Critical Current

Links

AU74081/74A 1973-10-10 1974-10-08 Combination rotary and percussion drill bit Expired AU492055B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US405115A US3885638A (en) 1973-10-10 1973-10-10 Combination rotary and percussion drill bit
USUS405115 1973-10-10

Publications (2)

Publication Number Publication Date
AU492055B2 true AU492055B2 (en) 1976-04-15
AU7408174A AU7408174A (en) 1976-04-15

Family

ID=

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