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

Image Number 9 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
Printing apparatus having extendable functionality and method thereof
Imaging apparatus, control method thereof, and program
Method and device for generating low-jitter clock
Cooling structure and cooling method for control rod drive mechanism and nuclear reactor
Multi-protocol data transfers
Method and apparatus for optimizing paging in a communication network
Systems and methods for controlling registration of advancing substrates in absorbent article converting lines
  Randomly Featured Patents
Lift truck
Method of changing tempo and pitch of audio by digital signal processing
Trailer door actuating mechanism
Winding-up device provided with a radiation source for positioning winding cores
6-substituted penem esters as anti-inflammatory and anti-degenerative agents
Appliance with dispenser
Mould for curved panels
Image formation
End cap assembly for an appliance control panel
Hard metal screw joint connection between soft metal members