Dosing device for adding a controlled amount of a gas to a fluid
US5845633A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1996 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Nov 22, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2202/0275
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In a dosing device and method for controlled dosing of a first gas into a second gas or liquid membrane which is permeable to the first gas separates the first gas from the second gas or liquid. Dosing of the first gas is performed by controlling diffusion through the membrane. The size of the active diffusion area can be regulated by a barrier which is moveable in relation to the membrane. When the barrier is moved in relation to the membrane, a larger or smaller part of the membrane's diffusion area can be exposed to the second gas or liquid. Alternatively, the membrane's permeability can be controlled or the partial pressure of the first gas can be controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.