Low-pressure valve
US6647983B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2001 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Jan 25, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/204
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A low-pressure valve enabling precise control of a fluid flow rate through the valve during cyclical operation of the valve. The valve is useful for controlling air delivery to a patient as part of a portable ventilator. The valve comprises a housing having an inlet 16 and two outlets 18 and 20. A wiper plate 22 and an orifice plate 24 are disposed inside of the housing. Transverse movement of the wiper plate 22 relative to the orifice plate 24, powered for example by a servomotor 34, simultaneously and alternatively covers and uncovers various openings 26 in the orifice plate 24. The total flow through the valve is thereby divided between the two outlets 78 and 20.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.