CA871961A - Extensible and retractable mast or derrick boom - Google Patents

Extensible and retractable mast or derrick boom

Info

Publication number
CA871961A
CA871961A CA871961A CA871961DA CA871961A CA 871961 A CA871961 A CA 871961A CA 871961 A CA871961 A CA 871961A CA 871961D A CA871961D A CA 871961DA CA 871961 A CA871961 A CA 871961A
Authority
CA
Canada
Prior art keywords
extensible
derrick boom
retractable mast
mast
retractable
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
CA871961A
Inventor
H. Bohr Alexander
O. Borcherdt Walter
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.)
ATK Launch Systems LLC
Original Assignee
Thiokol Corp
Publication date
Application granted granted Critical
Publication of CA871961A publication Critical patent/CA871961A/en
Expired legal-status Critical Current

Links

CA871961A Extensible and retractable mast or derrick boom Expired CA871961A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA871961T

Publications (1)

Publication Number Publication Date
CA871961A true CA871961A (en) 1971-06-01

Family

ID=36357956

Family Applications (1)

Application Number Title Priority Date Filing Date
CA871961A Expired CA871961A (en) Extensible and retractable mast or derrick boom

Country Status (1)

Country Link
CA (1) CA871961A (en)

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