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
Chair structure
Method of fabricating display device
Film-forming resins as a carrier for topical application of pharmacologically active agents
Display sheet, display device, and electronic apparatus
Method, apparatus, and system for energy efficiency and energy conservation including dynamic cache sizing and cache operating voltage management for optimal power performance
Apparatus for controllable delay cell and associated methods
  Randomly Featured Patents
Bicycle trainer
Off-axis high accuracy structured light profiler
Organic silicon removal from stripper overhead
System and method for scheduling a meeting
Nutritional supplements for healthy memory and mental function
Silver halide photographic emulsion, method of manufacturing the same, and photographic light sensitive material
Gamma survey probe for use on ocean, lake, estuary and river sediments
Prospector's shovel and crevicing tool
Baking apparatus
Highly automated agricultural production system