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US 5,676,009 AGranted
Pipe straightener and rerounder device
AssigneeChevron U.S.A. Inc.
InventorsBobby K. Bright, Ronald L. Bullock, Reijo N. Stoor
Life of this patent
Estimating the term…
Abstract
A portable device for straightening and rerounding plastic pipe with a straightening unit having three rollers, one of which is adjustable toward and away from the other two for reverse bending plastic pipe passing therebetween and with a rerounding unit having two rollers for applying sufficient pressure to the plastic pipe to remove ovalness.
Claims23
A portable device, comprising:
- a first fixed roller for contacting a first surface of a pipe and having an axis;
- a second fixed roller spaced rearward in the portable device from the first fixed roller for contacting the first surface of the pipe, the second fixed roller having an axis parallel to the axis through the first fixed roller;
- a movable roller located between the first fixed roller and the second fixed roller for contacting a second surface of the pipe opposite of the first surface, the movable roller is adjustable toward and away from a plane through the axis of the first fixed roller and the axis of the second fixed roller to remove substantially all of the permanent curvature in the pipe by applying pressure to the pipe;
- a stationary rerounding roller located aft of the second fixed roller for contacting a third surface between the first surface and the second surface of the pipe and having an axis;
- and
- an adjustable rerounding roller for contacting a fourth surface of the pipe opposite of both the third surface and the stationary rerounding roller and having an axis parallel to the axis of the stationary roller, the adjustable roller is directly opposed to the stationary roller and adjustable toward the stationary roller to apply pressure to remove ovalness of the pipe.
3 more elements
A portable device, comprising:
- a straightening means for removing substantially all of the permanent curvature in a pipe caused by being coiled;
- and
- a rerounding means oriented perpendicular to the straightening means for removing ovalness of the pipe caused by being coiled.
A method for removing coil set and ovalness from coiled pipe with a portable device, comprising:
- unwinding the pipe;
- straightening the pipe to remove substantially all of the permanent curvature in the pipe caused by being coiled;
- and
- rerounding the pipe to remove the ovalness of the pipe caused by being coiled by contacting directly opposed sides of the pipe with rerounding means.
1 more element
Dependencies are inferred from the claim text.