The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 1998
Filed:
May. 28, 1996
Steve Campbell, Ballwin, MO (US);
Other;
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.