Breathing gas supply controller
US3952773A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 20, 1975 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Jan 20, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87643
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A breathing gas supply controller, comprises a housing which has a gas inlet leading to an internal gas passage which opens at the opposite end in a gas supply opening for supplying gas to a place of use, such as to aid in a person's respiration. The interior gas passage has a widened portion with an elastic valve tube in the passage which defines an annular pressure chamber around the tube which is separated from the passage. A valve member extends through the passage and it includes an intermediate annular widened portion which is engaged against the interior of the valve tube in a closed position to close off the gas passage. A control chamber, which is defined in the housing, has a first control passage communicating with the pressure chamber and a second control passage communicating with the gas passage on the downstream or gas supply end thereof. The one-way flow connection to atmosphere permits the intake of air into the gas passage for mixing with the other gas such as oxygen for flow to the person for respiration. The air flow is aspirated into the passage, preferably by a nozzle formation downstream of the elastic valve tube, or which is formed as a downstream portion of…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.