Digital proportional metering pumping system
US4341327A · kind A · utility
38Cited by
3References
9Claims
0Family size
Inventor
Key dates
| Filing date | Feb 28, 1980 |
| Grant date | Jul 27, 1982 |
| Priority date | — |
| Expiry date | Feb 28, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D11/132
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A precision controlled variable speed pumping system for controlling the operation of one or more independently driven pump motors includes one or more valveless rotary pumps each having a reciprocating piston directly driven by an individual stepping motor and a digital control circuit for individually directing the operation of each stepping motor whereby the resultant sum output of the pumps may be utilized for mixing, blending or proportioning fluid flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.