Variable pressure and flow control for a pneumatically-operated gas demand apparatus
US6378520B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 29, 1999 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Oct 29, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2202/0208
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Pneumatically operated gas demand equipment coupled in interruptible fluid communication between a recipient and a source of pressurized respiratory gas and adapted for controlling delivery of the pressurized gas to the recipient as the recipient inhales and exhales. The equipment includes a supply valve and a sensing valve cooperable to intermittently deliver pressurized gas to the recipient responsive to the recipient's inhalation and exhalation. A regulator mechanism is disposed between and in fluid communication with the pressurized gas source and the supply valve. The equipment additionally includes a control device for controlling flow of pressurized gas from the pressurized gas source to the supply valve and from the pressurized gas source to the regulator mechanism. The control device also controls the pressure of pressurized gas discharged by the regulator mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.