Invention Grant
- Patent Title: Pipe liner and method of making same
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Application No.: US15926325Application Date: 2018-03-20
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Publication No.: US10704728B2Publication Date: 2020-07-07
- Inventor: Charles Free , Abu Abraham , Yevgeny Eugene Zaltsman
- Applicant: INA ACQUISITION CORP.
- Applicant Address: US DE Wilmington
- Assignee: INA Acquisition Corp.
- Current Assignee: INA Acquisition Corp.
- Current Assignee Address: US DE Wilmington
- Agency: Stinson LLP
- Main IPC: F16L55/16
- IPC: F16L55/16 ; F16L55/165 ; B32B7/03 ; B29C63/00 ; B29C65/50 ; B29C65/62 ; B29C65/00 ; B29C67/00 ; B32B1/08 ; B32B5/02 ; B32B5/26 ; B32B7/08 ; B29L23/00

Abstract:
An eversion liner for lining a pipe includes an impermeable outer portion, inner and outer strength portions inside the impermeable outer portion, and a middle portion including at least one felt layer radially between the inner and outer strength portions. At least one of the inner and outer strength portions is formed from a unitary sheet of strength material that includes parallel chopped strands of fiber. The longitudinal edge margins of the sheet of strength material are positioned in overlapping engagement and joined together by joining structure. The parallel chopped fibers can be oriented transverse to the length of the liner. The joining structure can prevent reduction in a width of the overlapped edge margins as the liner expands during eversion.
Public/Granted literature
- US20190293223A1 PIPE LINER AND METHOD OF MAKING AND INSTALLING THE SAME Public/Granted day:2019-09-26
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