# US 12,599,743 B2 · Bidirectional flow-controllable artificial respirator

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- Number: US 12,599,743 B2
- Document ID: US12599743B2
- Status: Granted
- Kind: B2
- Application number: 17/635,877
- Filed: 2020-08-14
- Published: 2022-09-15
- Granted: 2026-04-14
- Earliest claimed: 2019-08-16
- Assignees: Korea University Research and Business Foundation
- Applicants: Korea University Research and Business Foundation
- Inventors: Jang Woo Lee; Yoon Je Lee
- Web page: https://patentgrep.com/patent/US12599743B2

## CPC

- A61M 16/024: {including calculation means, e.g. using a processor}
- A61M 16/20: Valves specially adapted to medical respiratory devices
- A61M 16/0069: {the speed thereof being controlled by respiratory parameters, e.g. by inhalation}
- A61M 16/202: {electrically actuated}
- A61M 16/208: {Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves}
- A62B 18/10: Valves
- G09B 23/288: {for artificial respiration or heart massage}
- A61M 16/0084: {self-reinflatable by elasticity, e.g. resuscitation squeeze bags}
- A61M 16/06: Respiratory or anaesthetic masks
- A61M 16/0833: {T- or Y-type connectors, e.g. Y-piece}
- A61M 16/204: {used for inhalation control}
- A61M 16/205: {used for exhalation control}
- A61M 16/209: {Relief valves}
- A61M 2016/0027: {pressure meter}
- A61M 2016/0033: {electrical}
- A61M 2016/0039: {in the inspiratory circuit}
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- A62B: DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING (valves specially adapted for medical use A61M39/00; life-saving devices, apparatus or methods specially adapted for use in water B63C9/00; divers' equipment B63C11/00; specially adopted for use with aircraft, e.g. parachutes, ejector seats, {B64D17/00, B64D25/10}; rescue devices peculiar to mining E21F11/00)
- G09B: EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS (devices for psychotechnics or for testing reaction times A61B5/16; games, sports, amusements A63; projectors, projector screens G03B)

## Abstract

A bidirectional flow-controllable artificial respirator, according to one embodiment, comprises: a chamber for storing air; a tube connected to the chamber and having air flowing therein; a mask connected to the tube and mounted on a face or mouth; and a flow control valve unit provided in the tube and controlling the air flow between the chamber or an air supply source, and the mask. The flow control valve unit comprises: a first valve allowing an air supply path from the air supply source toward the mask; and a second valve allowing an air discharge path from the mask toward the outside of the respirator, wherein the first valve and the second valve are alternately opened and closed during artificial respiration, the first valve is blocked during chest compressions so that negative pressure in a subject receiving air is maintained for a long period, and the first valve and the second valve may be selectively opened and closed so as to allow air to be supplied according to a preset air supplying period.

## Claims

### Claim 1

A bidirectional flow-controllable artificial respirator comprising:
a chamber to store air;
a tube connected to the chamber such that the air flows therein;
a mask connected to the tube to be mounted around a face or oral cavity; and
a flow control valve unit disposed in the tube to control a flow of air between the mask and the chamber or an air supply source,
wherein the flow control valve unit comprises:
a first valve to allow an air supply path from the air supply source toward the mask, the first valve comprising:
a first transmission part through which the air passes when the air is supplied from the air supply source toward the mask;
a first opening/closing part disposed in the first transmission part to allow a flow only in one direction from the air supply source to the mask; and
a first control part disposed in the first transmission part and spaced apart from the first opening/closing part;
a second valve to allow an air discharge path from the mask to the outside of the artificial respirator, the second valve comprising:
a second transmission part through which the air passes when the air is discharged to the outside from the mask;
a second opening/closing part disposed in the second transmission part to allow a flow only in one direction from the mask to the outside; and
a second control part disposed in the second transmission part and spaced apart from the second opening/closing part, wherein the first and second valves are alternately opened or closed during artificial respiration, wherein the first valve is closed during chest compression so that negative pressure in a subject receiving air is maintained for a long period, and wherein the first and second valves are selectively opened or closed to allow a supply of air according to a preset air supply period; and
a measurement sensor disposed in the tube to measure a flow velocity of the air passing through the flow control valve unit or a pressure applied to a respiratory tract,
wherein when the supply of air is cut off during chest compression and when the pressure measured by the measurement sensor reaches a preset pressure during chest relaxation, the first control part selectively controls the supply of air through the first opening/closing part so that the supply of air is allowed according to the preset air supply period
wherein the second control part selectively controls a discharge of air through the second opening/closing part so that the discharge of air is allowed during chest compression and the discharge of air is cut off according to the preset air supply period,
wherein the first control part comprises a first rotary plate to open or close the first transmission part, the second control part comprises a second rotary plate to open or close the second transmission part, and the first and second rotary plates are disposed to be orthogonal to each other and rotate together by means of a rotary shaft to connect the first and second rotary plates.

### Claim 2 (depends on 1)

The bidirectional flow-controllable artificial respirator of claim 1, wherein the first control part is closed during chest compression to cut off the supply of air through the first opening/closing part,
wherein the first control part is opened at a preset point in time of the supply of air to allow the supply of air through the first opening/closing part,
wherein the first control part is closed to maintain negative pressure in the subject receiving air for a long period when a point in time is not the point in time of the supply of air,
wherein the second control part is opened during chest compression to allow the discharge of air through the second opening/closing part,
wherein the second control part is closed at the preset point in time of the supply of air to cut off the discharge of air through the second opening/closing part, and
wherein the second control part is opened to improve efficiency in supplying air when a point in time is not the point in time of the supply of air.

### Claim 3 (depends on 1)

The bidirectional flow-controllable artificial respirator of claim 1, wherein the first control part or the second control part comprises a single rotary plate to block an air transmission path.

### Claim 4 (depends on 1)

The bidirectional flow-controllable artificial respirator of claim 1, wherein the first control part or the second control part comprises a locking element to fix a closed state of the first opening/closing part or the second opening/closing part.

### Claim 5 (depends on 4)

The bidirectional flow-controllable artificial respirator of claim 4, wherein the locking element fixes the closed state of the first opening/closing part or the second opening/closing part by rotating.

### Claim 6 (depends on 4)

The bidirectional flow-controllable artificial respirator of claim 4, wherein the locking element fixes the closed state of the first opening/closing part or the second opening/closing part by sliding.