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    SELECTIVELY THRUSTING PROPULSION UNITS FOR AERIAL VEHICLES
    31.
    发明申请
    SELECTIVELY THRUSTING PROPULSION UNITS FOR AERIAL VEHICLES 审中-公开

    公开(公告)号：US20180044004A1

    公开(公告)日：2018-02-15

    申请号：US15794801

    申请日：2017-10-26

    Applicant: Amazon Technologies, Inc.

    Inventor： Dominic Timothy Shiosaki ,  Ricky Dean Welsh

    IPC: B64C27/14 ,  B64C11/46 ,  B64C39/02 ,  B64C27/57

    CPC classification number: B64C27/14 ,  B64C11/46 ,  B64C27/57 ,  B64C39/024 ,  B64C2201/027 ,  B64C2201/108

    Abstract: Aerial vehicles may include propulsion units having motors with drive shafts that may be aligned at a variety of orientations, propellers with variable pitch blades, and common operators for aligning the drive shafts at one or more orientations and for varying the pitch angles of the blades. The common operators may include plate elements to which a propeller hub is rotatably joined, and which may be supported by one or more linear actuators that may extend or retract to vary both the orientations of the drive shafts and the pitch angles of the blades. Operating the motors and propellers at varying speeds, gimbal angles or pitch angles enables the motors to generate forces in any number of directions and at any magnitudes. Attributes of the propulsion units may be selected in order to shape or control the noise generated thereby.

    Maintaining attitude control of unmanned aerial vehicles by varying centers of gravity
    37.
    发明授权
    Maintaining attitude control of unmanned aerial vehicles by varying centers of gravity 有权

    公开(公告)号：US11230371B2

    公开(公告)日：2022-01-25

    申请号：US16992074

    申请日：2020-08-12

    Applicant: Amazon Technologies, Inc.

    Inventor： Gur Kimchi ,  Dominic Timothy Shiosaki ,  Ricky Dean Welsh

    IPC: B64C25/26 ,  B64C17/02 ,  B64C25/10 ,  B64C25/52 ,  B64C27/52 ,  B64C39/02 ,  B64D31/06

    Abstract: Aerial vehicles may be configured to control their attitudes by changing one or more physical attributes. For example, an aerial vehicle may be outfitted with propulsion motors having repositionable mounts by which the motors may be rotated about one or more axes, in order to redirect forces generated by the motors during operation. An aerial vehicle may also be outfitted with one or more other movable objects such as landing gear, antenna and/or engaged payloads, and one or more of such objects may be translated in one or more directions in order to adjust a center of gravity of the aerial vehicle. By varying angles by which forces are supplied to the aerial vehicle, or locations of the center of gravity of the aerial vehicle, a desired attitude of the aerial vehicle may be maintained irrespective of velocity, altitude and/or forces of thrust, lift, weight or drag acting upon the aerial vehicle.

    Feathering propeller clutch mechanisms
    38.
    发明授权
    Feathering propeller clutch mechanisms 有权

    公开(公告)号：US10994836B2

    公开(公告)日：2021-05-04

    申请号：US14966493

    申请日：2015-12-11

    Applicant: Amazon Technologies, Inc.

    Inventor： Dominic Timothy Shiosaki

    IPC: B64C27/14 ,  B64C27/32 ,  B64D35/00 ,  B64C11/06 ,  B64C11/32 ,  B64C11/02 ,  B64C39/02 ,  B64C29/00 ,  B64C27/57

    Abstract: Aerial vehicles are equipped with propellers having clutch mechanisms that contract around a shaft when the propellers are not rotating, or are rotating at low angular velocities, and expand around the shaft when the propellers are rotating at sufficiently high angular velocities. The clutch mechanisms surround one or more fixed posts within an opening or window defined therein. When the clutch mechanisms contract into a closed position, components of the clutch mechanisms come into contact with the posts, and the propellers are forced to remain in an alignment defined by the posts. When the clutch mechanisms expand into an open position, such components may rotate freely without contacting the posts. The clutch mechanisms cause propellers to remain aligned in desired orientations when the propellers are not required for operation, thereby reducing drag or adverse acoustic effects.

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