Fluid swivel assembly
US4925219A · kind A · utility
Inventors
Key dates
| Filing date | Jul 21, 1988 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Jul 21, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L27/087
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid swivel is described, of a type which forms an annular chamber and a pair of gap passages extending in opposite directions from the chamber to the environment, with face seals along each gap passage. The fluid swivel uses a minimum number of parts and minimizes entrapment of sediment in the isolation seal lying between the chamber and the closest pressure seal. The high pressure ends of the primary and secondary seals in each gap passage, face in opposite radial directions, and the low pressure end of each secondary seal lies about as far from the axis of rotation of the swivel as the low pressure end of the corresponding primary seal. The gap passage includes a tapered portion leading from the annular chamber to the isolation seal, to enable circulation of fluid up to the isolation seal to minimize the buildup of sediment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.