Patent ID: 11866161
Assignee: nan
Field: Transport (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 0:
1. An electric helicopter comprising:
a fuselage; and
a first electric motor, a first drive shaft driven by the first electric motor, a first roller attached to the first drive shaft, the first roller rotating about a first roller axis; and
a first annular rotor, the first annular rotor including an open center, a first plurality of rotor blades extending radially outwardly from the first annular rotor, each rotor blade of the first plurality of rotor blades being coupled to the first annular rotor with a first pivot coupling, the pitch of each rotor blade of the first plurality of rotor blades being adjustable at the first pivot coupling, at least a portion of the fuselage being disposed in the open center of the first annular rotor, the first annular rotor being rotatable about a first annular rotor axis, the first annular rotor axis being perpendicular to the first roller axis; and
the first roller abutting and frictionally engaging the first annular rotor, rotation of the first roller causing rotation of the first annular rotor in a first direction of rotation; and
an electric power supply electrically coupled to the first annular electric motor.