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Title:
TRENCHLESS DRAINAGE STRUCTURE REPLACEMENT
Document Type and Number:
WIPO Patent Application WO/2012/048273
Kind Code:
A3
Abstract:
Replacement drainage structures and methods for replacing drainage structures are disclosed. An example method includes driving a plurality of sections of a replacement drainage structure around a buried drainage structure to be replaced. At least a portion of the drainage structure to be replaced is positioned within the interior of a section of the replacement drainage structure. Portions of the drainage structure to be replaced are removed.

Inventors:
HARR ROBERT E (US)
Application Number:
PCT/US2011/055449
Publication Date:
July 19, 2012
Filing Date:
October 07, 2011
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HARR TECHNOLOGIES INC (US)
HARR ROBERT E (US)
International Classes:
E03F3/04; E02D29/045; F16L1/00
Foreign References:
KR100610368B12006-08-09
JPH01102134A1989-04-19
EP0444217A11991-09-04
US4886396A1989-12-12
Attorney, Agent or Firm:
DORSEY & WHITNEY LLP et al. (701 Fifth AveSuite 610, Seattle Washington, US)
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