# US 2021/0330909 A1 · Blower for breathing apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0330909 A1 - Document ID: US20210330909A1 - Status: Published application - Kind: A1 - Application number: 17/368,678 - Filed: 2021-07-06 - Published: 2021-10-28 - Earliest claimed: 2016-04-29 - Assignees: Fisher & Paykel Healthcare Limited - Applicants: Fisher & Paykel Healthcare Limited - Inventors: Donald Roy Kuriger; Johannes Nicolaas Bothma - Web page: https://patentgrep.com/patent/US20210330909A1 ## CPC - A61M 16/0066: {Blowers or centrifugal pumps} - F04D 25/0606: {the electric motor being specially adapted for integration in the pump} - F04D 29/053: Shafts - F04D 29/059: Roller bearings - F04D 29/4253: {with axial entry and discharge} - F04D 29/5806: {Cooling the drive system} - A61M 2205/3606: cooled - A61M 2205/362: by gas flow - A61M 2205/42: Reducing noise - 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) ## Abstract This invention relates to a blower for a breathing apparatus. The blower comprising a bottom support with a stub axle, a top support with a stub axle, a motor core comprising a motor stator and rotor, and an impeller coupled to the motor core via a shaft, the shaft is rotatably coupled at a first end to the stub axle on the top support and at a second end via the stub axle on the bottom support. ## Claims ### Claim 1 (canceled) ### Claim 2 A blower for a breathing apparatus comprising: a housing comprising: a bottom support, and a top support; a motor core comprising a stator and a rotor; an impeller coupled to the motor core via a shaft; wherein a first end of the shaft is rotatably coupled to the top support via a first stub axle and first bearing arrangement and a second end of the shaft is rotatably coupled to the bottom support via a second stub axle and second bearing arrangement; and wherein the shaft is at least partially hollow. ### Claim 3 (depends on 2) The blower of claim 2, wherein at least one of the first bearing arrangements and the second bearing arrangements are located within the at least partially hollow shaft. ### Claim 4 (depends on 2) The blower of claim 2, wherein the housing further comprises an annular collector configured to collect flow from the impeller. ### Claim 5 (depends on 4) The blower of claim 4, wherein the housing further comprises an inner motor region, wherein the inner motor region is concentric with the annular collector. ### Claim 6 (depends on 5) The blower of claim 5, wherein the inner motor region is formed as a recess within the housing. ### Claim 7 (depends on 5) The blower of claim 5, wherein the inner motor region is formed by an inner wall of the annular collector. ### Claim 8 (depends on 6) The blower of claim 6, wherein the motor core is positioned within the recess of the housing. ### Claim 9 (depends on 2) The blower of claim 2, wherein the shaft is configured to rotate relative to the top support and the bottom support. ### Claim 10 (depends on 2) The blower of claim 2, wherein the housing further comprises an annular airflow stator ring. ### Claim 11 (depends on 2) The blower of claim 2, wherein at least one of the first stub angle and the second angle further comprises a shoulder that is formed by at least one of a flange, stepped portion, or a taper. ### Claim 12 (depends on 2) The blower of claim 2, wherein each of the first bearing arrangement and the second bearing arrangement comprise an inner race and an outer race, and wherein each of the first stub axle and the second stub axles couples to a respective inner race. ### Claim 13 (depends on 12) The blower of claim 12, wherein at least one of the first and second stub axle tapers within the respective inner race. ### Claim 14 (depends on 2) The blower of claim 2, wherein the blower does not comprise a volute. ### Claim 15 (depends on 2) The blower of claim 2, wherein the housing comprises a lower housing with a region for the motor and one or more apertures for axially receiving air from an inlet. ### Claim 16 (depends on 2) The blower of claim 2, wherein the blower is a single stage blower. ### Claim 17 (depends on 2) The blower of claim 2, wherein a ratio of the impeller diameter to a diameter of the housing is at least about 90%. ### Claim 18 (depends on 2) The blower of claim 2, wherein a maximum diameter of the shaft is independent of a diameter of a bearing in the first or second bearing arrangement. ### Claim 19 (depends on 2) The blower of claim 2, wherein a maximum diameter of the shaft is greater than a diameter of a bearing in the first or second bearing arrangement. ### Claim 20 (depends on 2) The blower of claim 2, wherein the shaft is completely hollow. ### Claim 21 A blower for a breathing apparatus comprising: a housing comprising: a bottom support, and a top support; a motor core comprising a stator and a rotor; an impeller coupled to the motor core via a shaft; wherein a first end of the shaft is rotatably coupled to the top support via a first stub axle and first bearing arrangement and a second end of the shaft is rotatably coupled to the bottom support via a second stub axle and second bearing arrangement wherein the shaft is configured to rotate relative to the top support and the bottom support; and wherein the shaft is at least partially hollow.