Asymmetric double screw rotor assembly
US6312242A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2000 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Aug 17, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C18/16
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An asymmetric double screw rotor assembly includes two asymmetric screw rotors respectively revolvably meshed together in a casing having an inlet and an outlet, the spiral threads of the screw rotors defining an uniform pitch, the outer diameter of the first screw rotor and the inner root diameter of the second rotor being uniform, the inner root diameter of the first screw rotor gradually increased from the inlet of the casing toward the outlet, the outer diameter of the second screw rotor gradually reduced from the inlet of the casing toward the outlet. Upon respective rotary motion of the screw rotors, the volume of the respective air chambers gradually reduces from the inlet of the casing toward the outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.