Positive displacement pumps
US4511316A · kind A · utility
7Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1982 |
| Grant date | Apr 16, 1985 |
| Priority date | — |
| Expiry date | Jul 1, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2/086
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A positive displacement pump comprising two lobed impellors to contra-rotate within a casing which has two ports to act respectively as an inlet and an outlet, the casing having two impellor chambers, each chamber being peripherally defined by two arcs, at least one of the arcs of each chamber being centered at a point offset from the normal rotational axis of the associated impellor in a direction towards one port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.