Flow diverter for controlling the pressure and flow rate in a CPAP device
US6895964B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2004 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Apr 27, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86525
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A flow diverter valve is used in controlling the pressure and/or flow rate of a breathable gas supplied to the airways of a patient by a breathable gas flow generator supply apparatus during, for example, ventilatory assistance treatments such as non-invasive positive pressure ventilation and nasal Continuous Positive Airway Pressure (CPAP) treatment of Obstructive Sleep Apnea. The flow diverter valve includes a vane and a housing. The housing has an inlet port, an outlet port, and an exhaust port. The exhaust port opens to atmosphere, and the inlet port is in fluid communication with the flow generator. The outlet port is in fluid communication with a patient mask via a conduit. The vane is configured with respect to the housing such that a blower associated with the CPAP apparatus remains substantially unchoked, regardless of whether the vane is in the open or closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.