Stator current based malfunction detecting system in a variable flow delivery pump
US5201636A · kind A · utility
13Cited by
6References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1991 |
| Grant date | Apr 13, 1993 |
| Priority date | — |
| Expiry date | Feb 19, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2207/701
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The current invention detects malfunctions in a variable flow delivery pump. These malfunctions prevent the pump from sustaining inherently high accuracy and/or cause damages to the pump. The invention detects the malfunctions without comparing sampled values to a preset absolute value. A malfunction is determined by a pattern of force exerted on a displacement pump in relation to the displacement positions. The pattern is compared to an empirically established range of pattern values. Once a malfunction is determined, the invention responds in a preselected manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.