Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1987-10-19
1989-06-13
Hindenburg, Max
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820524, A61M 1600
Patent
active
048382604
ABSTRACT:
Ventilator adapted to be connected to a source of gas comprising a case and an inlet adapted to be connected to the source of gas. It also is comprised of an oscillator cartridge carried by the case having a body with an inlet and an outlet and a flow passage interconnecting the inlet and the outlet. A valve member is carried by the body and is movable between open and closed positions with respect to the outlet. A diaphragm is also carried by the body and is connected to the valve member. A servo port is carried by the body for supplying gas to one side of the diaphragm to cause movement of the diaphragm to move the valve member between open and closed positions to interrupt the flow of gas from the inlet to the outlet. An adjustable impact metering valve is provided for metering the flow of gas to the servo port. A patient adapter and a pneumatic clutching device having an output coupled to the airway of the patient adapter are provided. A one-way check valve couples the adjustable impact metering valve to the outlet from the oscillator cartridge and the pneumatic clutching device. The impact metering valve in combination with said one-way check valve makes it possible to stack successive volumes of gas on the airway of the patient.
REFERENCES:
patent: 2724378 (1955-11-01), Wellman
patent: 3762595 (1973-10-01), Green et al.
patent: 4060078 (1977-11-01), Bird
patent: 4127123 (1978-11-01), Bird
patent: 4164219 (1979-08-01), Bird
patent: 4453197 (1984-06-01), Burrage
patent: 4592349 (1986-06-01), Bird
Hindenburg Max
Reichle K. M.
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