Lightweight and flexible rotors for positive displacement devices
US9441627B2 · kind B2 · utility
1Cited by
16References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 1, 2013 |
| Grant date | Sep 13, 2016 |
| Priority date | — |
| Expiry date | Aug 15, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2/1071
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A rotor for a progressive cavity device has a central axis and includes an outer tubular. The outer tubular has a radially outer surface and a radially inner surface defining a rotor cavity. The outer surface includes at least one helical rotor lobe. The rotor also includes a filler structure disposed within the rotor cavity. The outer tubular is made of a first material having a first density and the filler structure is made of a second material having a second density that is less than the first density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.