Plastic pipe welding apparatus and method
US4132578A · kind A · utility
Inventor
Key dates
| Filing date | Oct 15, 1976 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Oct 15, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1355
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for welding PVC pipe which includes a means to clamp and apply welding heat so that plastic pipes may be welded while under external pressure adapted to offset internal pressures. The method includes the steps of placing a clamp about a splice to be welded, tightening the clamp and applying heat through the clamp to the plastic in sufficient quantities to cause the plastic to fuse. The steps are carried out by utilizing an apparatus comprised of a clamp which is adapted to encompass the area to be welded and apply a constricting force to that area while heat is transferred through the clamping means to the plastic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.