CA588111A - Anneau d'extension de trou d'homme - Google Patents

Anneau d'extension de trou d'homme

Info

Publication number
CA588111A
CA588111A CA588111A CA588111DA CA588111A CA 588111 A CA588111 A CA 588111A CA 588111 A CA588111 A CA 588111A CA 588111D A CA588111D A CA 588111DA CA 588111 A CA588111 A CA 588111A
Authority
CA
Canada
Prior art keywords
extension ring
manhole extension
manhole
ring
extension
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
CA588111A
Other languages
English (en)
Inventor
J. Charles Robert
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.)
MANITOBA BRIDGE AND ENGINEERING WORKS Ltd
Original Assignee
MANITOBA BRIDGE AND ENGINEERING WORKS Ltd
Publication date
Application granted granted Critical
Publication of CA588111A publication Critical patent/CA588111A/fr
Expired legal-status Critical Current

Links

CA588111A Anneau d'extension de trou d'homme Expired CA588111A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA588111T

Publications (1)

Publication Number Publication Date
CA588111A true CA588111A (fr) 1959-12-01

Family

ID=35801655

Family Applications (1)

Application Number Title Priority Date Filing Date
CA588111A Expired CA588111A (fr) Anneau d'extension de trou d'homme

Country Status (1)

Country Link
CA (1) CA588111A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433838A (en) * 1966-09-21 1969-03-18 Allied Chem Purification of perhaloacetones
US4236358A (en) 1978-08-16 1980-12-02 National Utility Products Company Adjustable manhole cover support structure
US4861186A (en) * 1987-02-02 1989-08-29 Von Roll, Ag. Covering for an opening with a cover or grating placed in a frame
US4867600A (en) * 1987-07-23 1989-09-19 Bowman Harold M Polygonal manhole cover support

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433838A (en) * 1966-09-21 1969-03-18 Allied Chem Purification of perhaloacetones
US4236358A (en) 1978-08-16 1980-12-02 National Utility Products Company Adjustable manhole cover support structure
US4861186A (en) * 1987-02-02 1989-08-29 Von Roll, Ag. Covering for an opening with a cover or grating placed in a frame
US4867600A (en) * 1987-07-23 1989-09-19 Bowman Harold M Polygonal manhole cover support

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