Pump utilizing helical seal
US6074184A · kind A · utility
Inventor
Key dates
| Filing date | Aug 13, 1997 |
| Grant date | Jun 13, 2000 |
| Priority date | — |
| Expiry date | Aug 13, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2/107
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump utilizing a helical seal comprises a barrel member 4, a cylindrical core member 1 eccentrically arranged in said barrel member 4 and a helical seal 3 arranged between said cylindrical core member 1 and said barrel member 4. As the barrel member 4 and the cylindrical core member 1 are made to revolve relative to each other, the helical fluid path defined by the helical seal, the cylindrical core member 1 and the barrel member changes its capacity and the fluid contained in the barrel member is forced to axially move. Thus, the fluid is subjected not only to the axial force but also to the pressure that increases as the capacity of the helical fluid path formed by the helical seal is reduced by the relative revolution of the cylindrical core member 1 and the barrel member 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.