Flow through type liquid analyzer
US4725407A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1986 |
| Grant date | Feb 16, 1988 |
| Priority date | — |
| Expiry date | Mar 19, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/118339
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A flow through type liquid analyzer has PA1 an analytical portion; PA1 a peristaltic pump connected to the analytical portion for supplying various kinds of liquids to the analytical portion, a passage-change over valve mechanism for controlling the kinds of liquid supplied to the analytical portion, PA1 an air bubble adding mechanism for adding air bubbles to the liquid sent to the analytical portion from the passage-change over valve mechanism, PA1 a detecting device for detecting movement of the air bubbles from the air bubble adding mechanism to the analytical portion, and a controller connected to the detecting device and to the pump for determining the flow rate of the liquid being sent to the analytical portion from the detected movement and controlling the speed of rotation of the pump in response to the determined flow rate for automatically maintaining the flow rate of the liquid sent to the analytical portion at a predetermined desired value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.