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

Image Number 11 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
Method and system for filtering noises in an image scanned by charged particles
Communication system and time synchronization method
Method and system for utilizing native ethernet as a virtual memory interconnect
Systems and methods for identifying similar documents
Thermochromic microparticles, dispersions thereof, and manufacturing method thereof, as well as light-modulating coatings, light-modulating films and light-modulating inks
Stand for food service
Bacterial superantigen vaccines
  Randomly Featured Patents
Method of forming blanks for coins
Heat-sensitive recording materials and recording process of using the same
Method for manufacturing gas diffusion layer for fuel cell
Control equipment for a series capacitor connected into an electric power line
Diaryl-p-phenylenediamine disulfides
Combined suntan lotion distributor and cap therefor
Surface tension tank with multiple delivery rates
Stand for supporting a hand-held implement
Methods for enhancing service and reducing service cost in mobile satellite systems
Apparatus for fin replacement in a heat exchanger tube