Pipe joints or couplings – With assembly means or feature – Molded joint facilitator
Patent
1997-10-29
1998-11-17
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
Molded joint facilitator
285331, 1562799, 1563971, F16L 1300
Patent
active
058366210
ABSTRACT:
A method and apparatus are disclosed for a thermoplastic pipe joint. The pipe joint consists of a channel machined or routed into each end of the pipes to be joined and a coupler manufactured from substantially the same type of thermoplastic material as the pipes, with an electrical resistance element embedded into the coupler. Application of power to the electrical resistance element raises the temperature of the interface between the coupler the pipe walls causing the thermoplastic material to form a fusion bond between the coupler and the pipes, resulting in a leak free joint with no interior flow obstructions or exterior collars or protrusions. There is also disclosed a method for electrofusion welding solid wall thermoplastic pipes without leaving an interior or exterior obstruction by machining a socket and nipple on the pipes to be joined and adding an electrical resistance element to the nipple.
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