Invention Grant
- Patent Title: Trenchless drainage structure replacement
-
Application No.: US14605712Application Date: 2015-01-26
-
Publication No.: US09651167B2Publication Date: 2017-05-16
- Inventor: Robert E. Harr
- Applicant: Harr Technologies, Inc.
- Applicant Address: US AK Anchorage
- Assignee: Harr Technologies, Inc.
- Current Assignee: Harr Technologies, Inc.
- Current Assignee Address: US AK Anchorage
- Agency: Dorsey & Whitney LLP
- Main IPC: F16L1/036
- IPC: F16L1/036 ; F16L55/18 ; E21B7/20 ; E21B7/30 ; E21B17/03 ; F16L55/168 ; F16L1/028 ; F16L9/22

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.
Public/Granted literature
- US20150369394A1 TRENCHLESS DRAINAGE STRUCTURE REPLACEMENT Public/Granted day:2015-12-24
Information query