Fusion bonded epoxy removal tool
a technology of fusion bonded epoxy and removal tool, which is applied in the direction of manufacturing tools, flexible wheel wheels, metal-working apparatus, etc., can solve the problems of excess damage to the metal, difficult to apply the desired force of the drum against the outer surface of a pipe having an epoxy surface, and the inability to guarantee a tight seal of the coupling that attaches the repair length to the existing pip
Inactive Publication Date: 2018-12-06
ILLINOIS TOOL WORKS INC
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- Summary
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- Claims
- Application Information
AI Technical Summary
Benefits of technology
The present invention is a tool with a rotating shaft that has fingers attached to it. These fingers are made of a spring metal and have an abrasive pad with diamond particles embedded in it. The tool has a spring force applied to its associated abrasive pad by each finger, resulting in a more efficient and effective tool for machining.
Problems solved by technology
Also, the manufacturers of the couplings that attach the repair length to the existing pipe do not guarantee a tight seal unless the fusion bonded epoxy is removed from the repair area.
It has been found that it is difficult to apply the desired force of the drum against the outer surface of a pipe having an epoxy surface because of the weight of the drum itself.
Similar problems exist where the drum is applied against a horizontal portion of the pipe.
Method used
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[0014]Referring to FIGS. 1 through 5, a tool in accordance with the present invention, a tool 10 is rotatably symmetric about an elongate shaft 12 having a rearward end 14 adapted for insertion into the retainer of a rotatable machine, not shown, a longitudinal axis 15, and a threaded outer end 16 for threadedly retaining a working end 18. For the purposes of this discussion the working end 18 of the tool 10 shall be considered the forward end of the tool 10, and elements described herein that are directed axially toward the working end 18 shall be considered the forward end thereof and elements that are directed axially toward end 14 of shaft 12 shall be considered the rearward end thereof.
[0015]The working end 18 is generally disc shaped in appearance and includes a centrally located hub 20 having a planar forward surface 22 and a parallel planar rearward surface 24. Extending rearwardly of the rearward surface 24 is a cylindrical projection 26 having opposing flats 28, 29. Extend...
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A tool for removing fusion bonded epoxy coating from the surface of a pipe has an elongate rotatable shaft suitable for being received in a rotating tool holder of a machine. Extending radially outward of the distal end of the shaft are a plurality of fingers, the outer ends of which are spaced apart. Each of the fingers is made of a spring metal, and at the distal end of each finger is an abrasive pad having diamond particles embedded in soft metal. Spring force is independently applied by each spring finger to its associated abrasive pad.
Description
[0001]The applicant claims priority from his provisional application filed Oct. 26, 2009 and assigned Ser. No. 61 / 254,804. The present invention relates to tools for removing fusion bonded epoxy from the surface of a pipe, and in particular to a disk-shaped tool for removing such fusion bonded epoxy.BACKGROUND OF THE INVENTION[0002]With the advent of offshore drilling and the transportation of liquids such as gas and oil through underwater pipes robotically operated machines are needed to repair pipes that extend through deep waters. Such pipes are electrically connected along their length. They also have a coating of fusion bonded epoxy on their outer surface to protect the metal of the pipe from corrosion caused by the chemicals in the ocean. To repair a submerged pipe, the pipe must first be cut in two locations to remove a defective portion, after which the disconnected ends of the undamaged portions must be prepared to receive a repaired length of pipe. One of the steps needed ...
Claims
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IPC IPC(8): B24D13/14B24D3/10B24D7/06
CPCB24D13/142B24D3/10B24D7/06
Inventor SWIATOWY, JEFFREY
Owner ILLINOIS TOOL WORKS INC