CA1002768A - Tunneling shield - Google Patents

Tunneling shield

Info

Publication number
CA1002768A
CA1002768A CA237,487A CA237487A CA1002768A CA 1002768 A CA1002768 A CA 1002768A CA 237487 A CA237487 A CA 237487A CA 1002768 A CA1002768 A CA 1002768A
Authority
CA
Canada
Prior art keywords
tunneling shield
tunneling
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
CA237,487A
Inventor
Douglas F. Winberg
Norman D. Dyer
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.)
Dresser Industries Inc
Original Assignee
Dresser Industries Inc
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 US363035A external-priority patent/US3870368A/en
Application filed by Dresser Industries Inc filed Critical Dresser Industries Inc
Priority to CA237,487A priority Critical patent/CA1002768A/en
Application granted granted Critical
Publication of CA1002768A publication Critical patent/CA1002768A/en
Expired legal-status Critical Current

Links

CA237,487A 1973-05-23 1975-10-14 Tunneling shield Expired CA1002768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA237,487A CA1002768A (en) 1973-05-23 1975-10-14 Tunneling shield

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US363035A US3870368A (en) 1973-05-23 1973-05-23 Tunneling shield
CA197,121A CA991870A (en) 1973-05-23 1974-04-09 Tunneling shield
CA237,487A CA1002768A (en) 1973-05-23 1975-10-14 Tunneling shield

Publications (1)

Publication Number Publication Date
CA1002768A true CA1002768A (en) 1977-01-04

Family

ID=27163417

Family Applications (1)

Application Number Title Priority Date Filing Date
CA237,487A Expired CA1002768A (en) 1973-05-23 1975-10-14 Tunneling shield

Country Status (1)

Country Link
CA (1) CA1002768A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010003214A1 (en) * 2008-07-07 2010-01-14 Mcnally Michael P Method of reducing stress on tunnel rock face under heavy overburden conditions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010003214A1 (en) * 2008-07-07 2010-01-14 Mcnally Michael P Method of reducing stress on tunnel rock face under heavy overburden conditions

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Legal Events

Date Code Title Description
MKEX Expiry

Effective date: 19940104