Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1997-10-30
2000-03-07
Weiss, John G.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820712, 12820419, 12820421, 12820312, A61M 1600
Patent
active
060326670
ABSTRACT:
A variable orifice pulse valve has a small internal volume for providing small, accurately measured pulse volumes of gas. The valve may be employed to supply a very small quantity of a therapeutic gas or a diagnostic gas into the breathing gases of a patient. The valve has a housing with an inlet for receiving the gas and an outlet providing the pulsatile discharge of the gas. A chamber, formed in the housing, has a first opening in fluid communication with the inlet and a second opening in fluid communication with the outlet. The intermediate chamber is formed to have a small volume compared to the minimum pulsatile gas discharge volume of the valve. A spring biases a variable orifice member toward the first opening and a solenoid moves the variable orifice member away from the first opening to form an orifice that meters a dose of gas into the valve. A sealing member is spring biased into sealing engagement with the second opening. A second control solenoid operates to move the second sealing member out of engagement with the second opening to form a pulse orifice in the valve that provides the pulsatile discharge of gas from the outlet. An outlet chamber of the valve may include a further inlet providing a carrier gas that sweeps the gas pulse exiting from the intermediate chamber out of the valve to prevent the gas pulse from being trapped in the valve.
REFERENCES:
patent: 4401116 (1983-08-01), Fry et al.
patent: 5411059 (1995-05-01), Sever et al.
patent: 5531218 (1996-07-01), Krebs
patent: 5558083 (1996-09-01), Bathe et al.
patent: 5771884 (1998-06-01), Yarnall et al.
patent: 5791339 (1998-08-01), Winter
patent: 5839433 (1998-11-01), Higenbottam
patent: 5862802 (1999-01-01), Bird
Instrumentarium Corporation
Srivastara Virendra
Weiss John G.
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