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

Image Number 7 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
Power saving methods for wireless systems
Method of controlling semiconductor device, signal processing method, semiconductor device, and electronic apparatus
Proximity-based mobile message delivery
Controller for flexible and extensible flow processing in software-defined networks
Traveling vehicle system and self-diagnosis method for the traveling vehicle system
Multipoint photonic doppler velocimetry using optical lens elements
Processing biomass
  Randomly Featured Patents
Scheduling methods for wireless networks
Decorative light string with a screw head
Functionalization of polyketone polymers
Motor vehicle air bag and fabric for use in same
Adhesive applicator
Fluid nozzle system and method in an emitted energy system for photolithography
Method and server for providing a mobile key
Loudspeaker with burning resistant diaphragm
Measuring signals in a tester system
Image forming apparatus having a detachable cartridge including a photoconductive drum with axis shaft having a minimal rotational eccentricity, and a method of assembling the image forming ap