Roots-type blower reduced acoustic signature method and apparatus
US7997885B2 · kind B2 · utility
8Cited by
147References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 18, 2008 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Feb 10, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C29/061
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A Roots-type blower with helical cycloidal rotors features relief recesses in the chamber walls, isolated from the input and output ports. The relief recesses counter variation in leakback flow with angular position intrinsic to helical cycloidal rotors, attenuating a noise source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.