Fluid handling – Self-proportioning or correlating systems – Supply and exhaust type
Patent
1988-03-10
1989-08-15
Hepperle, Stephen M.
Fluid handling
Self-proportioning or correlating systems
Supply and exhaust type
12820524, 13751625, A62B 902
Patent
active
048565482
ABSTRACT:
A resuscitation valve uses a pair of thin membrane valve elements that are spaced apart about an exhaust passage to provide increased reliability and simplify construction and fabrication. The resuscitation valve is of the nonrebreathing type and includes a valve housing that defines a chamber and an inlet port and patient port in communication therewith. The housing also defines an exhaust port. A center body is positioned in the housing and has a hollow interior communicating the chamber with the exhaust port. First, second, and third valve seats are located between the exhaust port and the center body, the inlet port and the chamber, and at one end of the center body, respectively. The pair of resilient membranes act as valve elements and one membrane closes the outlet port in response to negative pressure at the patient port by sealingly contacting the first valve seat; the second membrane closes the inlet port in response to pressure at the patient port that exceeds the pressure at the inlet port by sealingly contacting the second valve seat, and also closes the exhaust passage when positive pressure at the inlet port exceeds positive pressure inside the center body by sealingly contacting said third valve seat. A center body separates the valve elements and can be used to facilitate simple-snap together construction of the valve. The valve design is particularly suited for the fabrication of a disposable resuscitation valve.
REFERENCES:
patent: 3063461 (1962-11-01), Rudolph
patent: 3356100 (1967-12-01), Seeler
patent: 4204555 (1980-05-01), Durling
patent: 4449525 (1984-05-01), White et al.
patent: 4733919 (1988-03-01), Jacobs et al.
Hepperle Stephen M.
Tolomei John G.
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