US 12,441,479 B2
Electric vertical takeoff and landing (eVTOL) aircraft lift motor with air cooling
Raffaello Verna, Creedmoor, NC (US)
Assigned to BETA AIR LLC, South Burlington, VT (US)
Filed by BETA AIR LLC, South Burlington, VT (US)
Filed on May 15, 2023, as Appl. No. 18/197,394.
Application 18/197,394 is a continuation of application No. 17/563,498, filed on Dec. 28, 2021, granted, now 11,691,750.
Prior Publication US 2023/0303262 A1, Sep. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B64D 33/08 (2006.01); B64C 29/00 (2006.01); B64D 27/31 (2024.01); B64D 27/34 (2024.01); B64C 11/48 (2006.01)
CPC B64D 33/08 (2013.01) [B64C 29/0025 (2013.01); B64D 27/31 (2024.01); B64D 27/34 (2024.01); B64C 11/48 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A motor for an electric vertical takeoff and landing aircraft, the motor comprising:
a stator centered on an axis of rotation of the motor, the stator having an inner cylindrical surface and an outer cylindrical surface that is spaced radially outward from the inner cylindrical surface relative to the axis of rotation;
a rotor that includes a rotor cylindrical surface, the rotor centered on the axis of rotation and disposed within the stator such that an air gap is formed between the rotor cylindrical surface and the inner cylindrical surface;
a plurality of magnets positioned on the rotor cylindrical surface and spaced from the inner cylindrical surface of the stator by the air gap; and
a fan configured to rotate with the rotor, the fan including:
a base platform located at an axial end of the rotor, the base platform having a surface that extends inward from a perimeter of the rotor at an angle relative to the axis of rotation; and
a plurality of blades that protrude from the surface, the plurality of blades configured to direct air toward the air gap.