Lung-controlled membrane valve for compressed gas respirators
US4178961A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 1977 |
| Grant date | Dec 18, 1979 |
| Priority date | — |
| Expiry date | Oct 11, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7782
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A lung-controlled valve for compressed gas respirators comprises a valve housing having a diaphragm chamber with a diaphragm extending across the chamber and being displaceable backwardly and forwardly in the chamber by pressure changes on respective sides thereof. A connecting piece for supplying breathing gas to a patient is connected into the chamber on one side of the diaphragm and the patient's breathing pressure controls the operation of the diaphragm. A valve member having a valve chamber with a pressure gas inlet has a valve seat in the chamber with a valve opening into one side of the diaphragm chamber. A valve body closing the valve seat and shutting off the pressure gas flow into the chamber has a tippling lever connected thereto and disposed in the one diaphragm chamber adjacent the diaphragm in a position to be contacted during movement thereof to open the valve. A hand operated lift off member is mounted in the valve housing for displacement into engagement with the valve to lift it off the valve seat and to open the valve passage when a temporary supply of pressure gas is necessary for the system. The lift off member is advantageously biased by a spring member backwa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.