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

Image Number 8 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
Image forming apparatus and method for making density correction in a low resolution image based on edge determination
Composite conductive pads/plugs for surface-applied nerve-muscle electrical stimulation
Print control server, print controlling method, and print control program
Micromechanical component, device for beam deflection of monochromatic light, and spectrometer
System and method for providing security in browser-based access to smart cards
System and method for efficient association of a power outlet and device
  Randomly Featured Patents
Adaptive scanning method
Portable electric driver
Suspension structure for a continuous track machine
Method and apparatus for detecting Viterbi decoder errors due to quasi-catastrophic sequences
Method for fabricating a semiconductor structure using a protective layer, and semiconductor structure
Process for manufacturing circuit board
Mammography apparatus
Apparatus for moving disabled persons
Cis-2-[(4-heteroaryl-1-piperazinyl)alkyl] hexahydro-1H-isoindole-1,3 (2H)-diones and related compounds and their therapeutic utility
Multi-function seats