Flow-metered pumping with load compensation system and method
US5509788A · kind A · utility
11Cited by
15References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1995 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Aug 16, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2205/05
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention is an improved flow-metered pumping system using an air-backed diaphragm pump with load compensation. A variable motor speed controller is used to compensate for flow rate reduction caused by pressure effects. When the output pressure on the pump increases to a point where the load on the pump motor exceeds a specified threshold, the motor speed controller increases the speed of the motor to compensate for pressure induced diaphragm distortion losses and to achieve a substantially constant flow rate across a range of pump output pressures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.