CA180522A - Tunnel shield - Google Patents

Tunnel shield

Info

Publication number
CA180522A
CA180522A CA000180522A CA180522DA CA180522A CA 180522 A CA180522 A CA 180522A CA 000180522 A CA000180522 A CA 000180522A CA 180522D A CA180522D A CA 180522DA CA 180522 A CA180522 A CA 180522A
Authority
CA
Canada
Prior art keywords
tunnel shield
tunnel
shield
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
CA000180522A
Other languages
French (fr)
Inventor
Cornelius Gerald Hastings
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.)
HASTINGS TUNNEL SYSTEM Co
Original Assignee
HASTINGS TUNNEL SYSTEM 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
Application filed by HASTINGS TUNNEL SYSTEM Co filed Critical HASTINGS TUNNEL SYSTEM Co
Application granted granted Critical
Publication of CA180522A publication Critical patent/CA180522A/en
Expired legal-status Critical Current

Links

CA000180522A 1917-08-10 1917-08-10 Tunnel shield Expired CA180522A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA180522T 1917-08-10

Publications (1)

Publication Number Publication Date
CA180522A true CA180522A (en) 1917-11-20

Family

ID=45300175

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000180522A Expired CA180522A (en) 1917-08-10 1917-08-10 Tunnel shield

Country Status (1)

Country Link
CA (1) CA180522A (en)

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