Screw pump and method of operating the same
US7338266B2 · kind B2 · utility
2Cited by
5References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 2, 2003 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | Nov 18, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K51/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A screw pump includes a pair of screw rotors (2a, 2b) having teeth which are held in mesh with each other for drawing and discharging a fluid by rotating the screw rotors (2a, 2b) synchronously in opposite directions. The teeth of the screw rotors (2a, 2b) have the same shape as each other and are coiled helically in opposite directions. The teeth of the screw rotors (2a, 2b) have an axial tooth profile which allows a pair of facing teeth surfaces T of the screw rotors (2a, 2b) to be brought into contact with each other only at a pitch line P when the pair of facing teeth surfaces T are brought into contact with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.