Apparatus for administering a controlled dosage of a chemical substance having an improved culture chamber
US4618586A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1983 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | Apr 8, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D11/138
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
An apparatus delivers a dosage of a chemical stimuli or drug in such a controlled manner that the concentration at the point of delivery is known at each and every point in time. The apparatus includes a plurality of vessels with each vessel containing a different concentration of the drug or chemical stimuli. A valve has a plurality of inlets and a single outlet wherein each inlet is connected to a corresponding vessel. An improved culture chamber is fluidly connected to the outlet of the valve and is used to develop the desired concentration. A first pump is positioned preferably between the valve and the chamber to provide a transport force for delivering the chemical stimuli or drug to the chamber. A suction tube is positioned proximate the top of the chamber and has a bottom open end which defines the level of liquid within the chamber. The suction tube thereby keeps the volume within the chamber constant. A second pump provides a transport force for removing excess liquid from the chamber. The valve, the first pump and the second pump are controlled by a computer control system. The computer control system determines which inlet of the valve is fluidly connected to the outlet…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.