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

Image Number 5 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 apparatus for detecting and tracking vehicles
Systems and methods for controlling registration of advancing substrates in absorbent article converting lines
Information processing apparatus and display control method
Phosphor, light emitting apparatus, and liquid crystal display apparatus using the same
Pet burial pod
Antibodies to CCR2
System for wireless local area network (WLAN) transmission and for coexistence of WLAN and another type of wireless transmission and methods thereof
  Randomly Featured Patents
Resin composition containing granular or powdery phenol-aldehyde resin
Bus controller command block processing system
Circuit for driving second harmonic generator
Method and device for limiting vehicle speed
System and method for OCDMA-based photonic layer security robustness to archival attack
Three-terminal thyristor with single MOS-gate controlled characteristics
Purification of coke oven gas with production of sulfuric acid and ammonium sulfate
System and method for improving a user's performance on reading tests