Automatic mixture control apparatus and method
US5027267A · kind A · utility
53Cited by
21References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1989 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Mar 31, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F2101/28
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An automatic mixture control apparatus includes a micro-computer-based data acquisition and control device which responds in real time to flowmeter and densimeter signals to control water inlet and bulk cement valves so that a cement slurry is produced at the desired rate and density. The data acquisition and control device is programmed to provide means for computing desired positions for the valves and for computing corrections for the positions. A related automatic mixture control method is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.