Oxygen blending in a piston ventilator
US6412483B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2000 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | May 16, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2016/0027
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A piston ventilator is disclosed herein which uniquely includes an oxygen blending module which supplies oxygen enhancement for aiding patients requiring respiratory treatment. The oxygen blending module supplies a preselected enrichment of oxygen to a piston and cylinder assembly wherein the amount of oxygen permitted to flow therein is continuously monitored and controlled according to the volume above the piston in the cylinder as calculated by a controller. The oxygen blending module includes a flow sensor which monitors the flow of supplemental oxygen into the piston and cylinder assembly, and further includes a primary oxygen control valve which restricts the flow of oxygen through the flow sensor to the piston and cylinder assembly depending on the difference between the calculated desired amount of oxygen and the target amount of oxygen provided to the controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.