Liquid delivery device, method of controlling such liquid delivery device, and liquid delivery pump
US6092994A · kind A · utility
3Cited by
6References
10Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 28, 1998 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Jan 28, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D15/0066
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A screw pump includes a casing having inlet and outlet ports and a pump rotor rotatably mounted in the casing and having screw threads communicating with said inlet and outlet ports. The pump rotor is rotated by a reversible speed-controllable motor, typically a DC brushless motor, mounted in the casing to deliver a liquid such as a chemical solution from the inlet port through a liquid passage defined by the screw threads to the outlet port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.