Invention Grant
- Patent Title: Pipe extraction assisted by pre-stressed strand
-
Application No.: US16866720Application Date: 2020-05-05
-
Publication No.: US11112033B2Publication Date: 2021-09-07
- Inventor: Robert F. Crane , Mark D. Randa , Steven W. Wentworth
- Applicant: The Charles Machine Works, Inc.
- Applicant Address: US OK Perry
- Assignee: The Charles Machine Works, Inc.
- Current Assignee: The Charles Machine Works, Inc.
- Current Assignee Address: US OK Perry
- Agency: Tomlinson McKinstry, P.C.
- Main IPC: F16L1/028
- IPC: F16L1/028 ; F16L55/18 ; B66D3/00 ; F16L1/06

Abstract:
A machine for extracting a ductile pipe. The machine has a vise which can grip the pipe, and a wire clamp. Each of the wire clamp and vise are supported on a carriage which is movable relative to a frame. This enables the vise to grip and pull the ductile pipe. Additionally, a wire strand may be disposed through the pipe from a far end to the end at which the machine is placed. The wire clamp allows the machine to pre-stress the strand to improve the extraction of the ductile pipe.
Public/Granted literature
- US20200378529A1 Pipe Extraction Assisted By Pre-Stressed Strand Public/Granted day:2020-12-03
Information query