Pulse-free blower
US4215977A · kind A · utility
50Cited by
6References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1977 |
| Grant date | Aug 5, 1980 |
| Priority date | — |
| Expiry date | Nov 14, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C29/0035
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A three-lobe Root's blower is provided with feed back structure to bring the gas trapped in the impeller well volumes up to the discharge pressure prior to delivery. An essentially uniform and pulse-free discharge is produced by having a constant feed back flow rate which is achieved by always having a trapped impeller well volume in communication with the outlet via feed back structure which is sized to yield a continuous feed back flow rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.