公开(公告)号：US20240158111A1

公开(公告)日：2024-05-16

申请号：US18508395

申请日：2023-11-14

Applicant: Toofon, Inc.

Inventor： Michael V. OL ,  Morteza GHARIB ,  Amir EMADI

IPC: B64U30/297 ,  B64U10/16 ,  B64U30/24

CPC classification number: B64U30/297 ,  B64U10/16 ,  B64U30/24 ,  B64U2201/10

Abstract: A coaxial rotor pair assembly, e.g., for a flight vehicle or drone, with a fixed-pitch rotor and a variable-pitch rotor that are axially spaced relative to one another on a rotor axis for rotation via rotor shafts. A first motor and a second motor are provided for the rotors to drive the respective rotor about the rotor axis. The first and second motors are each controlled by a speed controller, and speed controllers are controlled by a vehicle flight controller. A collective pitch of the plurality of blades of the variable-pitch rotor is configured to be selectively varied by the vehicle flight controller during rotation of both the fixed-pitch rotor and the variable-pitch rotor about the rotor axis. The plurality of blades of the fixed-pitch rotor are maintained a constant, fixed pitch, e.g., during operation of the flight vehicle.

公开(公告)号：US20240286735A1

公开(公告)日：2024-08-29

申请号：US18508397

申请日：2023-11-14

Applicant: Toofon, Inc.

Inventor： Nathan SWEDLOVE ,  Hubert WANG ,  Michael V. OL ,  Amir Emadi ,  Morteza GHARIB

IPC: B64C11/44

CPC classification number: B64C11/44

Abstract: A collective pitch adjustment mechanism for a variable-pitch rotor that has blades for rotation about a rotor axis, e.g., for a flight vehicle or drone, via a motor. The mechanism has a servo actuator and a bearing cage for blade rotation. The servo actuator varies the collective pitch of the blades via a pushrod, and a servo actuator arm is configured for rotation and connected to the pushrod via a joint. Mounting portions are provided for securement of the blades and an actuation horn is coupled to the pushrod. The blades are rotationally and/or translationally coupled to the actuation horn via the mounting portions. The servo actuator causes rotational movement of the servo actuator arm, which in turn causes translational movement of the pushrod, which causes linear movement of the actuation horn to thereby collectively cause a collective change in a pitch angle, i.e. the collective pitch, of the blades.