Double-acting rotary expansible chamber pump adaptable to series or parallel operation
US4043704A · kind A · utility
3Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 15, 1975 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Jul 15, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C28/14
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a double-acting rotary compressor having two compression spaces each constituted by at least one variable-volume compression chamber which is put into communication first with the suction enclosure and then with the discharge enclosure, the power consumption at low delivery is reduced by causing the two compression spaces to discharge in parallel into a common duct in the vicinity of maximum delivery and connecting the spaces in series for deliveries below a predetermined value by joining the outlet of the first space to the second space at a point at which the compression chamber is already isolated from the suction enclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.