Method of molding a polar boss to a composite pressure vessel
US5538680A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1994 |
| Grant date | Jul 23, 1996 |
| Priority date | — |
| Expiry date | Jun 24, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF17C2205/0305
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for securing a boss to a thermoplastic liner of a pressure vessel are disclosed. A preferred method of forming the vessel includes inserting a thermoplastic projection of the liner into a mounting aperture located in the boss. The projection, which is rigidly attached to the liner, mechanically prevents rotation of the boss about a pressure chamber orifice relative to the liner. The method further includes melting and compressing the thermoplastic projection to conform it to a locking chamber in the mounting aperture. A composite case is then constructed over the thermoplastic projection, the liner, and the boss, using the liner as a mandrel. The thermoplastic liner and projection are integrally formed by blow-molding thermoplastic material into a die without any substantial use of injection-molding. A vessel constructed according to the method is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.