Probe and syringe drive apparatus
US4228831A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1978 |
| Grant date | Oct 21, 1980 |
| Priority date | — |
| Expiry date | Dec 11, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/1086
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Automatic dispensing apparatus such as used in a chemical analysis system for transferring liquids from sample containers to analysis containers, including a pipet probe assembly with an elongated probe, probe drive means for inserting the probe into the sample and moving the probe assembly between the sample container and analysis container, means for aspirating and dispensing a portion of the sample from the probe into a respective analysis container, an elongated level sensing probe extending downwardly from the probe assembly, with the difference in distance between the tip of the level sensing probe and the tip of the pipet probe defining the amount of penetration of the pipet probe tip below the sample level, and control means, including means responding to the tip of the level sensing probe contacting said sample level to stop the probe drive means thereby minimizing the penetration of the pipet probe tip below the sample level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.