Plastic pipe elements and methods for making same
US4514244A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1984 |
| Grant date | Apr 30, 1985 |
| Priority date | — |
| Expiry date | Mar 12, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1066
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A plastic pipe element comprises an inner one-piece liner of thermoplastic material. The liner is formed so as to include at least one cylindrical leg having a free outer end and inner end disposed intermediate opposite ends of the liner. At least one pipe section is formed comprising an inner thermoplastic lining and a fiber reinforced outer layer. That pipe section is bonded to an outer surface of the cylindrical leg such that an inner end edge of the pipe section overlies the liner. A sheet of fiber reinforced thermosetting resin molding compound is applied externally around the inner end edge of the pipe section and is subjected to pressure and heat to form the sheet into a desired shape. Thereafter, the sheet is allowed to harden. Elements formed in this manner include a T-fitting, a pipe flange, a 90.degree. fitting, a reducer fitting, a 45.degree. fitting, and a pipe cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.