Resources Contact Us Home
Weldable couple for electrofusion coupling of profile wall thermoplastic pipes without a separate coupler

Image Number 6 for United States Patent #6131954.

A method and apparatus are disclosed for a thermoplastic profile wall pipe joint or weld assembly without the use of a coupler to provide for a leak free pipe joint with substantially flush interior and exterior surfaces. The pipe joint consists of configuring the two pipe ends to be joined by removing substantially all of a first wall and the helical rib from the first pipe end, removing a portion of the helical rib from the second pipe end, coupling the pipe ends together and heating the weld assembly couple to fusion weld the pipe ends together. An electrical resistance element is provided for and placed within the pipe joint to provide the required heat. Also disclosed is the use of a thermoplastic sheet with the electrical resistance element to allow the end margins of the electrical resistance element to overlap without shorting by separating the end margins radially from one another and to allow for a more uniform fusion welded pipe joint. The resulting joint is a leak free joint with no interior flow obstructions or exterior collars or protrusions without the need for a coupler.

  Recently Added Patents
Antibodies to OX-2/CD200 and uses thereof
Piperazinedione compounds
Method and system for fail-safe call survival
Toner cartridge and image forming apparatus including the same
Determination method for a reinitialization of a temporal sequence of fluoroscopic images of an examination region of an examination object
Sampling switch circuit that uses correlated level shifting
  Randomly Featured Patents
Lever-operated hoist or puller
Cooperative drive robot
Muteins of bilin-binding protein
Cable drum handling apparatus
Powder coating for generator stator bar end fitting and method for applying the powder coating
Cosmetic container
Current supply means for wideband distribution
Optical apparatus for detecting cavitation bubbles in liquids
Turbogroup of a power generating plant
Foundation for manufactured homes