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    Propeller surface area treatments for sound dampening
    1.
    发明授权
    Propeller surface area treatments for sound dampening 有权

    公开(公告)号：US10259574B2

    公开(公告)日：2019-04-16

    申请号：US14975236

    申请日：2015-12-18

    Applicant: Amazon Technologies,, Inc.

    Inventor： Brian C. Beckman ,  Gur Kimchi ,  Allan Ko

    IPC: B64C27/467 ,  B64C11/00 ,  B64C27/473 ,  B64C39/02 ,  B64C11/20 ,  B64C11/26 ,  B64C27/20

    Abstract: Sounds are generated by an aerial vehicle during operation. For example, the motors and propellers of an aerial vehicle generate sounds during operation. Disclosed are systems, methods, and apparatus for actively adjusting the position of one or more propeller blade treatments of a propeller blade of an aerial vehicle during operation of the aerial vehicle. For example, the propeller blade may have one or more propeller blade treatments that may be adjusted between two or more positions. Based on the position of the propeller blade treatments, the airflow over the propeller is altered, thereby altering the sound generated by the propeller when rotating. By altering the propeller blade treatments on multiple propeller blades of the aerial vehicle, the different sounds generated by the different propeller blades may effectively cancel, reduce, and/or otherwise alter the total sound generated by the aerial vehicle.

    Selecting propellers for performance and noise shaping
    2.
    发明授权
    Selecting propellers for performance and noise shaping 有权

    公开(公告)号：US10232931B2

    公开(公告)日：2019-03-19

    申请号：US14975506

    申请日：2015-12-18

    Applicant: Amazon Technologies, Inc.

    Inventor： Howard Lee Huddleston, Jr. ,  Brian C. Beckman ,  Allan Ko

    IPC: B64C11/00 ,  B64C27/32 ,  G05D1/10 ,  G05D13/00 ,  B64C39/02 ,  B64C27/08

    Abstract: Aerial vehicles may be operated with discrete sets of propellers, which may be selected for a specific purpose or on a specific basis. The discrete sets of propellers may be operated separately or in tandem with one another, and at varying power levels. For example, a set of propellers may be selected to optimize the thrust, lift, maneuverability or efficiency of an aerial vehicle based on a position or other operational characteristic of the aerial vehicle, or an environmental condition encountered by the aerial vehicle. At least one of the propellers may be statically or dynamically imbalanced, such that the propeller emits a predetermined sound during operation. A balanced propeller may be specifically modified to cause the aerial vehicle to emit the predetermined sound by changing one or more parameters of the balanced propeller and causing the balanced propeller to be statically or dynamically imbalanced.

    Reconfiguring propellers during aerial vehicle operation
    3.
    发明授权
    Reconfiguring propellers during aerial vehicle operation 有权

    公开(公告)号：US10179646B1

    公开(公告)日：2019-01-15

    申请号：US15454785

    申请日：2017-03-09

    Applicant: Amazon Technologies, Inc.

    Inventor： Brian C. Beckman ,  Allan Ko

    IPC: B64C11/20 ,  B64C27/08 ,  B64C39/02 ,  B64C27/46

    Abstract: An aerial vehicle may be equipped with propellers having reconfigurable geometries. Such propellers may have blade tips or other features that may be adjusted or reconfigured while the aerial vehicle is operating, on any basis. Propellers having reconfigurable blade tips joined to blade roots may cause the blade tips to be aligned with the blade roots, or substantially perpendicular to the blade roots, e.g., in order to counter adverse effects of tip vortices, or at any intervening angle. The propellers may be reconfigured at predetermined times during operation of an aerial vehicle, or upon sensing one or more operational characteristics or environmental conditions, as may be desired or required.

    SELECTING PROPELLERS FOR PERFORMANCE AND NOISE SHAPING
    5.
    发明申请
    SELECTING PROPELLERS FOR PERFORMANCE AND NOISE SHAPING 有权

    公开(公告)号：US20210309346A1

    公开(公告)日：2021-10-07

    申请号：US17351037

    申请日：2021-06-17

    Applicant: Amazon Technologies, Inc.

    Inventor： Howard Lee Huddleston, JR. ,  Brian C. Beckman ,  Allan Ko

    IPC: B64C11/00 ,  B64C27/08 ,  B64C27/32 ,  B64C39/02 ,  G05D1/10 ,  G05D13/00

    Abstract: Aerial vehicles may be operated with discrete sets of propellers, which may be selected for a specific purpose or on a specific basis. The discrete sets of propellers may be operated separately or in tandem with one another, and at varying power levels. For example, a set of propellers may be selected to optimize the thrust, lift, maneuverability or efficiency of an aerial vehicle based on a position or other operational characteristic of the aerial vehicle, or an environmental condition encountered by the aerial vehicle. At least one of the propellers may be statically or dynamically imbalanced, such that the propeller emits a predetermined sound during operation. A balanced propeller may be specifically modified to cause the aerial vehicle to emit the predetermined sound by changing one or more parameters of the balanced propeller and causing the balanced propeller to be statically or dynamically imbalanced.

    Geometrically reconfigurable propellers
    6.
    发明授权
    Geometrically reconfigurable propellers 有权

    公开(公告)号：US10822077B1

    公开(公告)日：2020-11-03

    申请号：US16222973

    申请日：2018-12-17

    Applicant: Amazon Technologies, Inc.

    Inventor： Brian C. Beckman ,  Allan Ko

    IPC: B64C27/46 ,  B64C11/20 ,  B64C39/02 ,  B64C27/08

    Abstract: An aerial vehicle may be equipped with propellers having reconfigurable geometries. Such propellers may have blade tips or other features that may be adjusted or reconfigured while the aerial vehicle is operating, on any basis. Propellers having reconfigurable blade tips joined to blade roots may cause the blade tips to be aligned with the blade roots, or substantially perpendicular to the blade roots, e.g., in order to counter adverse effects of tip vortices, or at any intervening angle. The propellers may be reconfigured at predetermined times during operation of an aerial vehicle, or upon sensing one or more operational characteristics or environmental conditions, as may be desired or required.

    Aerial vehicle delivery shroud
    7.
    发明授权
    Aerial vehicle delivery shroud 有权

    公开(公告)号：US10086951B1

    公开(公告)日：2018-10-02

    申请号：US15669336

    申请日：2017-08-04

    Applicant: Amazon Technologies, Inc.

    Inventor： Brian C. Beckman ,  Allan Ko

    IPC: B64D47/00 ,  B64C19/00 ,  B64C39/02 ,  B64D1/08

    Abstract: Described is an aerial vehicle, such as an unmanned aerial vehicle (“UAV”) that includes a delivery shroud. The delivery shroud may be maintained in a retracted position while the aerial vehicle is in transit. The delivery shroud reduces the transmission of sound from the aerial vehicle to the delivery area. Likewise, the delivery shroud may also be used to facilitate delivery of a payload from the aerial vehicle to a delivery location within the delivery area.

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