Supply valve and diaphragm for a pneumatically-operated gas demand apparatus
AssigneeSalter Labs
InventorJames M. Davenport
Life of this patent
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Abstract
A supply valve for a pneumatically-operated gas demand apparatus or an intermittent gas delivery device disposed between a source of pressurized respiratory gas and a patient. The valve includes first and second housing parts defining a chamber and having first and second cooperating fluid passageways. A flexible diaphragm member is disposed in the chamber. The diaphragm member includes a central sealing portion and a radial projection integral with the central sealing portion for enabling fluid communication between the first and second fluid passageways and for sealing the first and second passageways against leakage.
Claims8
A flexible diaphragm member adapted for disposition in a chamber formed between first and second housing parts of a valve housing wherein the first and second housing parts include respective first and second cooperating fluid passageways, said diaphragm member comprising:
- a central sealing portion for dividing the chamber into a supply chamber region and a control chamber region;
- and
- means integral with said central sealing portion for enabling fluid communication between the first and second fluid passageways, said means integral with said central sealing portion comprising a projection extending outwardly from a peripheral edge of said central sealing portion, said projection including an aperture for permitting communication between the first and second fluid passageways.
A valve comprising:
- a valve housing including first and second housing parts defining a chamber, said first and second housing parts including respective first and second cooperating fluid passageways;
- and
- a flexible diaphragm member disposed in said chamber, said diaphragm member comprising:
- a central sealing portion for dividing said chamber into a supply chamber region and a control chamber region;
- and
- means integral with said central sealing portion for enabling fluid communication between said first and second fluid passageways, said means integral with said central sealing portion comprising a projection extending outwardly from a peripheral edge of said central sealing portion, said projection including an aperture for permitting communication between said first and second passageways.
Dependencies are inferred from the claim text.