Dual control valve for positive pressure artificial respiration apparatus
First Claim
1. In a positive-pressure artificial respiration apparatus, for aiding in inspiration and expiration cycles of breathing by a patient, of the type having a continuously-operating blower connected to a blower motor mounted in a motor chamber and having a first discharge path means from said blower to a first discharge port connected to a breathing tube and a second discharge path means from said blower through said motor chamber around said motor and to a second discharge port connected to an exhaust line, the improvement comprising:
- (a) a first cyclic valve means between the said first discharge port and the breathing tube to open to permit air flow from the blower and into the breathing tube and to close to stop such air flow;
(b) a second cyclic valve means between the said second discharge port and the exhaust line to open to permit air flow from the blower and into the exhaust line and to close to stop such air flow; and
(c) an interlinking drive means to cyclically drive the said first and second cyclic valve means in opposition to close the second cyclic valve means when the first cyclic valve means is open and to open the second cyclic valve means when the first cyclic valve means is closed.
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Accused Products
Abstract
The present invention relates to improvements in the portable, positive-pressure artificial respiration apparatus and, more particularly, to improvements in the air passageway systems of such apparatus by using a dual control valve.
91 Citations
9 Claims
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1. In a positive-pressure artificial respiration apparatus, for aiding in inspiration and expiration cycles of breathing by a patient, of the type having a continuously-operating blower connected to a blower motor mounted in a motor chamber and having a first discharge path means from said blower to a first discharge port connected to a breathing tube and a second discharge path means from said blower through said motor chamber around said motor and to a second discharge port connected to an exhaust line, the improvement comprising:
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(a) a first cyclic valve means between the said first discharge port and the breathing tube to open to permit air flow from the blower and into the breathing tube and to close to stop such air flow; (b) a second cyclic valve means between the said second discharge port and the exhaust line to open to permit air flow from the blower and into the exhaust line and to close to stop such air flow; and (c) an interlinking drive means to cyclically drive the said first and second cyclic valve means in opposition to close the second cyclic valve means when the first cyclic valve means is open and to open the second cyclic valve means when the first cyclic valve means is closed. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. The method for regulating the air flow in a positive-pressure artificial respiration apparatus, for aiding in inspiration and expiration cycles of breathing by a patient, of the type having a continuously-operating blower connected to a blower motor mounted in a motor chamber and having a first discharge path means from said blower to a first discharge port connected to a breathing tube and a second discharge path means from said blower through said motor chamber around said motor and to a second discharge port connected to an exhaust line and a valve means at each discharge port, including the steps of:
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(a) cyclically operating the valve means at the said first discharge port to open to permit air flow from the blower and into the breathing tube and to close to stop such air flow; (b) cyclically operating the valve means at the said second discharge port to open to permit air flow from the blower and into the exhaust line and to close to stop such air flow; and (c) regulating the aforesaid cyclic valve means operations to stop air flow into the exhaust line when air is flowing into the breathing tube and to permit air flow into the exhaust line when the air flow into the breathing tube is stopped. - View Dependent Claims (9)
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Specification