# US 2024/0200566 A1 · Sealing assembly for a shaft passage opening for a fan > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0200566 A1 - Document ID: US20240200566A1 - Status: Published application - Kind: A1 - Application number: 18/555,579 - Filed: 2022-04-04 - Published: 2024-06-20 - Earliest claimed: 2021-04-16 - Assignees: Pittway Sarl - Applicants: Pittway Sarl - Inventors: Kay Jarysek; Martin Petersmann; Gerrit Wascher; Martin Koelker - Web page: https://patentgrep.com/patent/US20240200566A1 ## CPC - F04D 25/08: the working fluid being air, e.g. for ventilation - F04D 29/102: {especially adapted for elastic fluid pumps} - F04D 17/16: for displacing without appreciable compression - F04D 19/002: {Axial flow fans} - F04D 25/0606: {the electric motor being specially adapted for integration in the pump} - F04D 29/043: Shafts - F04D 29/046: Bearings - F04D 29/059: Roller bearings - F04D 29/083: {especially adapted for elastic fluid pumps} - F04D 29/626: {Mounting or removal of fans} - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) ## Abstract The present disclosure describes a sealing assembly (100) for sealing a shaft (150) passage opening (141) comprising: a rotatable motor shaft (150) with at least one bearing (161) which is supported by at least one bearing support (170), a motor plate (140) with a passage opening (141) for the motor shaft (150) with the at least one bearing (161), a seal (110) having a first scaling portion (111) and a second scaling portion (112), wherein the first sealing portion (111) is arranged between at least a portion of an outer peripheral surface of the at least one bearing (161) and a portion of the bearing support (170); and the second scaling portion (112) extends radially outwardly in a direction away from the motor shaft (150) and is fixed against radial and axial displacements on the motor plate (140) by fixing means, wherein the second sealing portion (112) is spaced from an edge of the passage opening (141). ## Claims ### Claim 1 A sealing assembly for sealing a shaft passage opening comprising: a rotatable motor shaft with at least one bearing which is supported by at least one bearing support, a motor plate with a passage opening for the rotatable motor shaft with the at least one bearing, a seal having a first sealing portion and a second sealing portion, wherein the first sealing portion is arranged between at least a portion of an outer peripheral surface of the at least one bearing and a portion of the at least one bearing support; and the second sealing portion extends radially outwardly in a direction away from the rotatable motor shaft and is fixed against radial and axial displacements on the motor plate by fixing means, wherein the second sealing portion is spaced from an edge of the passage opening. ### Claim 2 (depends on 1) The sealing assembly according to claim 1, wherein the fixing means are configured to materially bond or create a form-fit and/or friction-lock between the second sealing portion and the motor plate. ### Claim 3 (depends on 1) The sealing assembly according to claim 1, wherein the fixing means comprises a fastening component attached to the motor plate, wherein the fastening component is configured and arranged to fix the second sealing portion on the motor plate. ### Claim 4 (depends on 3) The sealing assembly according to claim 3, wherein the motor plate comprises one or more protruding portions and/or one or more indentation to centre and/or connect the seal and/or the fastening component via form and/or friction-lock. ### Claim 5 (depends on 3) The sealing assembly according to claim 3, wherein the fastening component is electrically conductive and comprises a protective earth contact and/or is arranged to extend radially outwardly in order to fasten a cover of a motor, wherein optionally the protective earth contact of the fastening component can be oriented in one or more predetermined directions via at least two protruding portions. ### Claim 6 (depends on 1) The sealing assembly according to any claim 1, wherein the seal comprises a third sealing portion, intermediate the first sealing portion and the second sealing portion, wherein the third sealing portion has at least one arcuate shape and is disposed radially inwardly from the second sealing portion. ### Claim 7 (depends on 6) The sealing assembly according to claim 6, wherein the third sealing portion extends into the passage opening and passes from the second sealing portion through the motor plate via the passage opening, further wherein the third sealing portion is configured and arranged to be straight and/or have a different curvature after passing through the motor plate to extend to the first sealing portion. ### Claim 8 (depends on 1) The sealing assembly according to claim 1, wherein the first sealing portion is arranged substantially axially between the portion of the outer peripheral surface of the at least one bearing and the portion of the at least one bearing support and/or wherein the first sealing portion has a substantially L-shaped cross-section having at its radially inward end a substantially horizontal seal member to be securely fitted between opposing sealing surfaces of the at least one bearing support and one of the at least one bearing or a washer. ### Claim 9 (depends on 1) The sealing assembly according to claim 1, wherein the seal is resilient. ### Claim 10 (depends on 1) The sealing assembly according to claim 1, wherein the second sealing portion comprises an annular enlargement along or in the proximity of an outer circumference of the second sealing portion. ### Claim 11 (depends on 1) The sealing assembly according to any claim 1, wherein the rotatable motor shaft includes a rotor operable to rotate the rotatable motor shaft, and the second sealing portion is fixed to a side of the motor plate facing the rotor. ### Claim 12 (depends on 1) The sealing assembly according to claim 1, wherein the seal is rotationally symmetric about an axis, further wherein the first sealing portion is located at a first radius (Rm) from the axis and the second sealing portion is located at a second radius (Rm) from the axis, and the second radius (Rm) is greater than the first radius (Rm) and wherein the first radius (Rm) is spaced from the rotatable motor shaft. ### Claim 13 A method for assembling a sealing assembly comprising: providing a motor plate with a passage opening; inserting a seal comprising a first sealing portion and a second sealing portion at least partially into the passage opening such that the second sealing portion is spaced from an edge of the passage opening; and fixing the second sealing portion to the motor plate. ### Claim 14 (depends on 13) The method according to claim 13, wherein the motor plate includes one or more protruding portions and/or one or more indentations and wherein the fixing the second sealing portion to the motor plate includes: positioning the second sealing portion adjacent to a radially inwardly facing side of the one or more protruding portions of the motor plate; positioning a fastening component on the second sealing portion such that the second sealing portion is arranged between the motor plate and the fastening component; and pressing a portion of the one or more protruding portions on the fastening component such that the fastening component and the second sealing portion are retained via a form-fit and/or friction-lock. ### Claim 15 (depends on 1) A method for verifying tightness of the sealing assembly of claim 1 and further comprising a motor coupled to an end of the rotatable motor shaft in a motor housing and a fan coupled to another end of the rotatable motor shaft in a fan housing; the method comprising: providing at least one sealed bearing or sealing the at least one bearing; increasing a pressure and/or providing a test gas selected from inert gases, nitrogen, noble gases or combination thereof preferably on the fan side of the sealing assembly; and detecting one or more of a pressure change over time, a flow rate or a test gas in order to verify the tightness of the sealing assembly. ### Claim 16 (depends on 2) The sealing assembly according to claim 2, wherein the fixing means comprises a fastening component attached to the motor plate, wherein the fastening component is configured and arranged to fix the second sealing portion on the motor plate. ### Claim 17 (depends on 4) The sealing assembly according to claim 4, wherein the fastening component is electrically conductive and comprises a protective earth contact and/or is arranged to extend radially outwardly in order to fasten a cover of a motor, wherein optionally the protective earth contact of the fastening component can be oriented in one or more predetermined directions via at least two protruding portions. ### Claim 18 (depends on 5) The sealing assembly according to claim 5, wherein the seal comprises a third sealing portion, intermediate the first sealing portion and the second sealing portion, wherein the third sealing portion has at least one arcuate shape and is disposed radially inwardly from the second sealing portion. ### Claim 19 (depends on 7) The sealing assembly according to claim 7, wherein the first sealing portion is arranged substantially axially between the portion of the outer peripheral surface of the at least one bearing and the portion of the at least one bearing support and/or wherein the first sealing portion has a substantially L-shaped cross-section having at its radially inward end a substantially horizontal seal member to be securely fitted between opposing sealing surfaces of the at least one bearing support and one of the at least one bearing or a washer. ### Claim 20 (depends on 8) The sealing assembly according to claim 8, wherein the seal is resilient.