US 12,227,300 B2
Systems and methods for oil maintenance in gearboxes for eVTOL aircraft
Scott Graves, Felton, CA (US); and Robert Wayne Moore, Auburn, CA (US)
Assigned to Archer Aviation Inc., San Jose, CA (US)
Filed by Archer Aviation Inc., San Jose, CA (US)
Filed on Mar. 28, 2024, as Appl. No. 18/620,917.
Application 18/620,917 is a continuation of application No. 18/299,276, filed on Apr. 12, 2023, granted, now 12,024,304.
Claims priority of provisional application 63/378,680, filed on Oct. 7, 2022.
Claims priority of provisional application 63/378,536, filed on Oct. 6, 2022.
Prior Publication US 2024/0270394 A1, Aug. 15, 2024
Int. Cl. H02K 11/33 (2016.01); B60L 15/06 (2006.01); B60L 15/38 (2006.01); B64C 27/54 (2006.01); B64C 29/00 (2006.01); B64D 27/24 (2006.01); B64D 33/08 (2006.01); B64D 35/02 (2006.01); F16B 2/06 (2006.01); F16H 57/08 (2006.01); H02K 1/27 (2022.01); H02K 1/32 (2006.01); H02K 5/124 (2006.01); H02K 5/20 (2006.01); H02K 7/08 (2006.01); H02K 7/116 (2006.01); H02K 9/19 (2006.01); H02K 15/03 (2006.01); H02M 7/5395 (2006.01); H02P 21/00 (2016.01); H02P 25/16 (2006.01); H02P 27/06 (2006.01); H02P 27/08 (2006.01); H02K 7/00 (2006.01)
CPC B64D 27/24 (2013.01) [B60L 15/06 (2013.01); B60L 15/38 (2013.01); B64C 27/54 (2013.01); B64C 29/0008 (2013.01); B64C 29/0033 (2013.01); B64D 33/08 (2013.01); B64D 35/02 (2013.01); F16B 2/06 (2013.01); F16H 57/08 (2013.01); H02K 1/27 (2013.01); H02K 1/32 (2013.01); H02K 5/124 (2013.01); H02K 5/203 (2021.01); H02K 7/08 (2013.01); H02K 7/116 (2013.01); H02K 9/19 (2013.01); H02K 11/33 (2016.01); H02K 15/03 (2013.01); H02M 7/5395 (2013.01); H02P 21/50 (2016.02); H02P 25/16 (2013.01); H02P 27/06 (2013.01); H02P 27/08 (2013.01); B60L 2200/10 (2013.01); B60L 2210/40 (2013.01); H02K 7/006 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A motor assembly for an electric propulsion system, the motor assembly comprising:
a motor housing;
a stator ring disposed about an interior perimeter of the motor housing;
a rotor positioned within the stator ring;
a main shaft connected to the rotor via a gear reduction, wherein the main shaft extends through the rotor;
a power inverter comprising:
an inverter housing mounted to a first end of the motor housing; and
circuitry configured to:
receive an input of a direct current;
convert the direct current to an alternating current; and
provide the alternating current to the stator ring of the motor assembly; and
a fluid distribution system comprising:
a fluid reservoir within the motor housing;
a pump configured to distribute a fluid to a component of the motor assembly; and
a filter configured to filter the fluid, wherein the filter is located adjacent to the main shaft at the first end of the motor housing, wherein the fluid distribution system is configured to direct the fluid from an outer circumferential side of the filter toward an inner side of the filter.