Method for manufacturing an integral threaded connection for a composite tank
US5376200A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1993 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Aug 30, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/712
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing a fiber reinforced, resin matrix, tank with an integral fitting, such as an internally threaded pipe connection, bulkhead door or manhole entryway. A thread form tool having a cylindrical bore and a rounded pattern thread forming outer surface at one end is provided. The tool is secured to a drive shaft extending through the tank forming mandrel with the thread forming end adjacent to the mandrel. A second, thread is formed on the opposite end of the threat form tool opposite the tank mandrel and carries a consolidation nut. A consolidation washer rides on a wider cylinder surface of the thread form tool intermediate the two threaded ends. At least one fabric doily or band is placed over the thread forming tool rounded threads and the tank mandrel is filament wound with high strength fibers impregnated with a resin in a conventional manner, with filaments overlapping the rounded thread area. When sufficient filaments have been wound, the consolidation nut is tightened, driving the spacer and consolidation washer towards the filaments on the rounded thread region, consolidating the windings and forming a flat seating area substantially perpendicular to the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.