Sand resistant fluid swivel
US6073777A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1999 |
| Grant date | Jun 13, 2000 |
| Priority date | — |
| Expiry date | Apr 12, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L27/093
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid swivel of the type that includes a transfer chamber (56) formed between inner and outer main parts (52, 54), is constructed so sand and other particles settling out of the fluid, does not find its way into the lower gap passage (86) and quickly wear out a seal. A second of the main parts has a lower wall with a raised barrier (110) close to the top (122) of the lower gap passage. The first main part lower wall forms a first barrier (112) in the form of a projection that lies closely over the second barrier. The two barriers are closely spaced to form an entrance region (120) leading to the lower gap passage, with the entrance region including an upstream entrance part (132) that extends vertically or at an upward incline to discourage the migration of sand therealong.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.