CA923885A - Drilling mechanism - Google Patents

Drilling mechanism

Info

Publication number
CA923885A
CA923885A CA143290A CA143290A CA923885A CA 923885 A CA923885 A CA 923885A CA 143290 A CA143290 A CA 143290A CA 143290 A CA143290 A CA 143290A CA 923885 A CA923885 A CA 923885A
Authority
CA
Canada
Prior art keywords
drilling mechanism
drilling
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
CA143290A
Other versions
CA143290S (en
Inventor
S. Hattrup John
B. Poage Leland
T. Klein Harold
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.)
Robbins Co
Original Assignee
John S Hattrup
Robbins Co
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 CA047144A external-priority patent/CA918630A/en
Application filed by John S Hattrup, Robbins Co filed Critical John S Hattrup
Priority to CA143290A priority Critical patent/CA923885A/en
Application granted granted Critical
Publication of CA923885A publication Critical patent/CA923885A/en
Expired legal-status Critical Current

Links

CA143290A 1968-06-04 1972-05-29 Drilling mechanism Expired CA923885A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA143290A CA923885A (en) 1968-06-04 1972-05-29 Drilling mechanism

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US73432468A 1968-06-04 1968-06-04
CA047144A CA918630A (en) 1968-06-04 1969-03-28 Drilling machine for use in small tunnels
CA143290A CA923885A (en) 1968-06-04 1972-05-29 Drilling mechanism

Publications (1)

Publication Number Publication Date
CA923885A true CA923885A (en) 1973-04-03

Family

ID=25666037

Family Applications (2)

Application Number Title Priority Date Filing Date
CA143291A Expired CA923886A (en) 1968-06-04 1972-05-29 Mobile drilling mechanism
CA143290A Expired CA923885A (en) 1968-06-04 1972-05-29 Drilling mechanism

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA143291A Expired CA923886A (en) 1968-06-04 1972-05-29 Mobile drilling mechanism

Country Status (1)

Country Link
CA (2) CA923886A (en)

Also Published As

Publication number Publication date
CA923886A (en) 1973-04-03

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