Method and apparatus for removing deflection from plastic pipes
OwnerRichard L. Williamsinventor
Life of this patent
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Abstract
Method and apparatus for substantially reconstituting the internal diameter of sewer, water or drain line plastic pipes after being located in situ comprising a movable housing, sized preferably to at least 95 percent of the inside diameter of the pipe, and housing carried vibration means for causing such reconstitution of said pipe diameter substantially by virtue of vibration induced reallocation of the pipe encompassing earth or filler bed material.
Claims16
The method of restoring the diameter of a deflected flexible sewer or water pipe substantially to its original shape in an earth and bedding material encompassing situ comprising the steps of:
- (a) introducing into one end of the pipe a cylindrical vibrator-compactor device having an outside diameter slightly less than the inside diameter of the pipe,
- (b) initiating vibration of the device to transmit vibrations through the wall of the pipe to reform the bedding material to a higher density and stress relieve the pipe so as to restore the inside diameter of the pipe substantially to its original shape, and
- (c) propelling the device through the entire length of installed pipe completely backfilled substantially to the level of the original surface.
A device for substantially restoring the inside diameter of a deflected plastic sewer, water or drain pipe substantially to its original dimension when in an earth encompassing situ comprising a cylindrical housing having an outside diameter slightly less than the inside diameter of the pipe sufficient to move through the longitudinal, axial pathway defined by the inside diameter of the pipe, means connected to one end of the cylindrical housing for moving said housing through the pipe, and vibration means in said housing actuable to transmit vibrations through said housing and through the pipe, whereby transmitted vibrations act on the plastic pipe to reform the bedding material to a higher density and stress relieve the pipe so as to restore the inside diameter of the pipe substantially to its original shape.
Dependencies are inferred from the claim text.