Internal gear pump and an inner rotor of such a pump
US7407373B2 · kind B2 · utility
5Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2004 |
| Grant date | Aug 5, 2008 |
| Priority date | — |
| Expiry date | Jul 7, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19972
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An inner motor is structured to increase the discharge rate of an internal gear pump by making it possible to freely adjust the eccentricity e between the inner and outer rotors. Each tooth of the inner rotor includes a tooth bottom defined by hypocycloidal curves, an engaging portion to be brought into engagement with the outer rotor and defined by involute curves, and a tooth top defined by a predetermined curve such as a part of a circle or an oval or an epicycloidal curve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.