Automated dispensing and diluting system
US5158748A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1991 |
| Grant date | Oct 27, 1992 |
| Priority date | — |
| Expiry date | Jan 17, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/1025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for automatically dispensing and diluting an accurate volume of a sample includes a nozzle tip removably mounted on a nozzle for collecting a predetermined volume of the sample. The nozzle includes an inner tube and an outer tube. The system also includes a sample pump for sucking and discharging the sample and the reagent into and out of the nozzle tip, a first three-way valve that is adapted to communicate the reagent bottle with the sample pump or the sample pump with the nozzle, and a plunger pump for sucking and discharging a liquid surface-detecting gas supplied from a gas source. A second three way valve is adapted to communicate the gas source with the plunger pump or the plunger pump with the nozzle, and a pressure sensor is positioned between the second three-way valve and the gas passage in the nozzle. Also, a two-way valve is positioned between the pressure sensor and the gas passage of the nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.