# US 11,998,690 B2 · Single stage, axial symmetric blower and portable ventilator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,998,690 B2 - Document ID: US11998690B2 - Status: Granted - Kind: B2 - Application number: 17/087,715 - Filed: 2020-11-03 - Published: 2021-09-23 - Granted: 2024-06-04 - Earliest claimed: 2009-08-11 - Assignees: ResMed Motor Technologies Inc. - Applicants: ResMed Motor Technologies Inc. - Inventors: Timothy Tsun-Fai Fu; Dion Charles Chewe Martin; Philippe Auguste Chalvignac; Quangang Yang; David Creusot - Web page: https://patentgrep.com/patent/US11998690B2 ## CPC - A61M 16/0066: {Blowers or centrifugal pumps} - A61M 16/0069: {the speed thereof being controlled by respiratory parameters, e.g. by inhalation} - A61M 16/0605: {Means for improving the adaptation of the mask to the patient} - A61M 16/0633: {with forehead support} - A61M 16/0666: {Nasal cannulas or tubing (devices for improving normal breathing through the nose A61F5/08; nose filters A62B23/06; outside holding devices A61M25/02)} - A61M 16/0683: {Holding devices therefor} - A61M 16/0858: {Pressure sampling ports} - A61M 16/1045: {Devices for humidifying or heating the inspired gas by using recovered moisture or heat from the expired gas} - A61M 16/208: {Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves} - F04D 25/0606: {the electric motor being specially adapted for integration in the pump} - F04D 25/0666: {a sensor is integrated into the pump/motor design} - F04D 25/084: {hand fans} - F04D 29/4253: {with axial entry and discharge} - F04D 29/444: {Bladed diffusers} - A61M 16/0465: {Tracheostomy tubes; Devices for performing a tracheostomy; Accessories therefor, e.g. masks, filters} - A61M 16/049: {Mouthpieces} - A61M 16/0875: {Connecting tubes} - A61M 16/1055: {bacterial} - A61M 16/1065: {in the expiratory path} - A61M 16/107: {in the inspiratory path} - A61M 2016/0027: {pressure meter} - A61M 2016/0039: {in the inspiratory circuit} - A61M 2205/0227: Materials having sensing or indicating function, e.g. indicating a pressure increase - A61M 2205/3606: cooled - A61M 2205/42: Reducing noise - A61M 2205/8206: battery-operated - A61M 2209/086: Docking stations - A61M 2209/088: on the body - A61M 2230/202: partial carbon oxide pressure, e.g. partial dioxide pressure (P-CO2) - A61M 2230/432: partial CO2 pressure (P-CO2) - A61M 2230/435: partial O2 pressure (P-O2) - A61M 2230/63: Motion, e.g. physical activity - F05D 2250/52: Outlet - 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)} - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract A blower includes a housing including a proximal opening and a distal opening that are co-axially aligned, a stator component provided to the housing, an impeller positioned between the proximal opening of the housing and the stator component, and a motor adapted to drive the impeller. The impeller includes a plurality of impeller blades. The stator component includes a plurality of air directing grooves along its exterior surface. The leading edge of the air directing grooves extend tangentially outwards from the outer tips of the impeller blades and are configured to collect the air exiting the impeller blades and direct it from a generally tangential direction to a generally radial direction by dividing the air from the impeller and directing the air along a curved path towards the distal opening so that airflow becomes substantially laminar. ## Claims ### Claim 1 A ventilator, comprising: a blower including a blower housing having a proximal opening and a distal opening, and a motor arranged within the blower housing between the proximal opening and the distal opening, wherein the blower is configured to receive air from the proximal opening and provide pressurized air to the distal opening, and wherein the blower forms a flow path from the proximal opening to the distal opening; and a valve assembly provided to the blower, the valve assembly configured to allow air to flow through the blower housing along the flow path in a first direction from the proximal opening to the distal opening during an inhalation phase of a patient's breathing cycle and allow air to flow through the blower housing along the flow path in a second direction, opposite to the first direction, from the distal opening to the proximal opening during an exhalation phase of the patient's breathing cycle, wherein the valve assembly is coupled to the proximal opening of the blower and includes at least one expired air outlet, wherein the valve assembly includes an inlet valve and an outlet valve that are configured to separate flow traveling in the first direction from flow traveling in the second direction opposite to the first direction, the blower including a flow sensor system along the flow path of the blower, wherein the flow sensor system comprises a flow sensor and a flew element, wherein the flow sensor is in fluid communication with the flow path within the blower, and the flow sensor is configured and arranged to measure flow along the flow path within the blower in both the first and second directions, wherein the flow element is arranged adjacent to the flow sensor along the flow path within the blower, and wherein the flow element is provided to the motor within the blower housing and configured to conduct heat from the motor and to warm the adjacent flow sensor so as to at least minimize condensation to enhance flow measurement. ### Claim 2 (depends on 1) The ventilator according to claim 1, wherein the flow element is constructed of a heat conductive material. ### Claim 3 (depends on 2) The ventilator according to claim 2, wherein the flow element is constructed of aluminum. ### Claim 4 (depends on 1) The ventilator according to claim 1, wherein the flow element includes an inner core and a plurality of vanes extending from the inner core. ### Claim 5 (depends on 4) The ventilator according to claim 4, wherein the flow element includes 40-60 vanes. ### Claim 6 (depends on 4) The ventilator according to claim 4, wherein the inner core of the flow element includes a split configuration structured to allow the flow element to be fit around the motor and to expand and contract with changes in heat from the motor. ### Claim 7 (depends on 1) The ventilator according to claim 1, wherein the inlet valve includes a first membrane configured to control airflow into the proximal opening of the blower during the inhalation phase. ### Claim 8 (depends on 1) The ventilator according to claim 1, wherein the outlet valve includes a second membrane configured to control expired airflow to be released to atmosphere through the at least one expired air outlet. ### Claim 9 (depends on 1) The ventilator according to claim 1, wherein the valve assembly includes a filter configured to filter air before the air enters the blower. ### Claim 10 (depends on 1) The ventilator according to claim 1, further comprising a mucous trap provided to the distal opening of the blower and configured to capture any particulate matter expired by the patient. ### Claim 11 (depends on 1) The ventilator according to claim 1, further comprising a heat moisture exchange filter provided to the distal opening of the blower. ### Claim 12 (depends on 1) The ventilator according to claim 1 configured as a wearable system. ### Claim 13 (depends on 1) The ventilator according to claim 1, wherein the valve assembly is structured to allow air to flow into the blower via the proximal opening during the inhalation phase of the patient's breathing cycle and allow air to exit the blower via the proximal opening during the exhalation phase of the patient's breathing cycle. ### Claim 14 (depends on 1) The ventilator according to claim 1, wherein the valve assembly forms a muffling chamber to reduce noise. ### Claim 15 (depends on 1) A modular ventilator system, comprising: a ventilator module including the ventilator according to claim 1; and one or more of the following individually replaceable modules: a control module to remotely control the ventilator module; an extension battery module for the control module; an oxygen enhancement module provided to the ventilator module; a mucous trap module provided to a distal opening of the ventilator module; a heat moisture exchange filter module provided to a distal opening of the ventilator module; and/or a strap module including one or more straps to stabilize the ventilator module and/or the control module. ### Claim 16 (depends on 15) The modular ventilator system according to claim 15, wherein the control module includes an internal accelerometer and allows a pulse oximeter and/or a CO2 monitor to be connected to the control module. ### Claim 17 A ventilator, comprising: a blower including a blower housing having a proximal opening and a distal opening, and a motor arranged within the blower housing between the proximal opening and the distal opening, wherein the blower is configured to receive air from the proximal opening and provide pressurized air to the distal opening, and wherein the blower forms a flow path from the proximal opening to the distal opening; and a valve assembly provided to the blower, the valve assembly configured to allow air to flow through the blower housing along the flow path in a first direction from the proximal opening to the distal opening during an inhalation phase of a patient's breathing cycle and allow air to flow through the blower housing along the flow path in a second direction, opposite to the first direction, from the distal opening to the proximal opening during an exhalation phase of the patient's breathing cycle, wherein the valve assembly is provided to the proximal opening of the blower, wherein the valve assembly includes a first valve in communication with atmosphere and positioned and arranged to allow air to flow into the blower via the proximal opening during the inhalation phase of the patient's breathing cycle, and a second valve in communication with atmosphere and positioned and arranged to allow air to exit the blower via the proximal opening during the exhalation phase of the patient's breathing cycle, the blower including a flow sensor system along the flow path of the blower, wherein the flow sensor system comprises a flow sensor and a flow element, wherein the flow sensor is in fluid communication with the flow path within the blower, and the flow sensor is configured and arranged to measure flow along the flow path within the blower in both the first and second directions, wherein the flow element is arranged adjacent to the flow sensor along the flow path within the blower, and wherein the flow element is provided to the motor within the blower housing and configured to conduct heat from the motor and to warm the adjacent flow sensor so as to at least minimize condensation to enhance flow measurement.