# US 12,015,322 B2 · Electric motor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,015,322 B2 - Document ID: US12015322B2 - Status: Granted - Kind: B2 - Application number: 16/976,797 - Filed: 2019-02-19 - Published: 2020-12-31 - Granted: 2024-06-18 - Earliest claimed: 2018-03-01 - Assignees: Dyson Technology Limited - Applicants: Dyson Technology Limited - Inventors: Nigel Youatt Dymond; Lin Ji; Kevin Garcia - Web page: https://patentgrep.com/patent/US12015322B2 ## CPC - H02K 5/163: {radially supporting the rotary shaft at only one end of the rotor (H02K5/165, H02K5/167, H02K5/173 take precedence)} - H02K 5/1732: {radially supporting the rotary shaft at both ends of the rotor (H02K5/1737 takes precedence)} - H02K 5/1735: {radially supporting the rotary shaft at only one end of the rotor (H02K5/1737 takes precedence)} - H02K 5/24: specially adapted for suppression or reduction of noise or vibrations - H02K 9/06: with fans or impellers driven by the machine shaft - H02K 7/083: {radially supporting the rotary shaft at both ends of the rotor (H02K7/086, H02K7/09 take precedence)} - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract An electric motor having a frame, a rotor assembly, and a stator assembly. The rotor assembly has a magnet, a bearing assembly, an impeller, and a shaft. The bearing assembly has a first bearing, a second bearing, and a biasing element between the first and second bearings. The first bearing is mounted to the frame by an o-ring, and the second bearing is mounted to the frame by adhesive. ## Claims ### Claim 1 An electric motor comprising: a frame; a rotor assembly comprising a magnet, a bearing assembly, an impeller, and a shaft, wherein the bearing assembly comprises: a first bearing soft-mounted to the frame by an O-ring; a second bearing mounted to the frame by adhesive; and a biasing element between the first and second bearings, wherein the first bearing is located closer to the impeller than the second bearing; and a stator assembly comprising a plurality of c-shaped stator cores, wherein the stator assembly is soft-mounted to the frame by a deformable stator mounting member. ### Claim 2 (depends on 1) The electric motor of claim 1, wherein the frame comprises an annular groove within which the O-ring sits. ### Claim 3 (depends on 1) The electric motor of claim 1, wherein the frame comprises an uninterrupted surface covering the bearing assembly. ### Claim 4 (depends on 1) The electric motor of claim 1, wherein the bearing assembly is located downstream of the impeller. ### Claim 5 (depends on 1) The electric motor of claim 1, wherein the frame comprises an inner wall and an outer wall, the inner wall having a bore for receiving the bearing assembly, and the magnet is located downstream of the bearing assembly, outside the bore of the inner wall. ### Claim 6 (depends on 1) The electric motor of claim 1, wherein the impeller is in direct contact with at least a portion of the first bearing. ### Claim 7 (depends on 1) The electric motor of claim 1, wherein the O-ring is offset from a centre-point of the first bearing. ### Claim 8 (depends on 7) The electric motor of claim 7, wherein the O-ring is axially offset in a direction parallel to an axis of rotation of the impeller. ### Claim 9 (depends on 1) The electric motor of claim 1, wherein the frame includes a protrusion that cooperates with a recess of the impeller to form a seal. ### Claim 10 (depends on 1) The electric motor of claim 1, wherein the stator assembly further comprises a bobbin assembly having a centre portion and a plurality of arm portions that extend from the centre portion. ### Claim 11 (depends on 10) The electric motor of claim 10, wherein the centre portion of the bobbin assembly includes a bore configured to receive the magnet of the rotor assembly. ### Claim 12 (depends on 10) The electric motor of claim 10, wherein the stator assembly further comprises a winding wound around an arm portion of the bobbin assembly that is configured to induce a magnetic field in a c-shaped stator core of the plurality of c-shaped stator cores. ### Claim 13 (depends on 12) The electric motor of claim 12, wherein: each arm portion of the plurality of arm portions of the bobbin assembly includes an aperture; and each c-shaped stator core of the plurality of c-shaped stator cores slots into a corresponding aperture of the bobbin assembly. ### Claim 14 (depends on 1) The electric motor of claim 1, wherein the frame comprises a lug that extends from an inner wall of the frame in an axial direction, the lug being a mounting point for the stator assembly. ### Claim 15 (depends on 14) The electric motor of claim 14, wherein the stator assembly comprises a recess configured to interface with the lug of the frame.