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    Vibration attenuator
    11.
    发明授权
    Vibration attenuator 有权

    公开(公告)号：US11214361B2

    公开(公告)日：2022-01-04

    申请号：US16197761

    申请日：2018-11-21

    Applicant: Bell Helicopter Textron Inc.

    Inventor： Frank Bradley Stamps ,  David Heverly ,  Michael R. Smith ,  Michael Scott Seifert ,  Thomas C. Parham, Jr. ,  Gary Miller ,  Jouyoung Jason Choi ,  Richard E. Rauber

    IPC: B64C27/00

    Abstract: A vibration attenuator for an aircraft has first and second coaxial spinners configured for rotation about a mast axis and relative to a rotor. Upper and lower weights of each spinner are spaced radially from the axis and positioned 180 degrees from each other about the axis. The weights of each spinner are spaced from each other a distance parallel to the mast axis, each weight rotating about the mast axis in a different plane. The spinners rotate together relative to the rotor at a selected angular rate and are selectively rotatable relative to each other between a minimum-moment configuration, in which the upper weight of each spinner is angularly aligned with the lower weight of the other spinner, and a maximum-moment configuration, in which the upper weights are angularly aligned and the lower weights are angularly aligned, producing a whirling moment about the mast axis as the spinners rotate.

    SKID LANDING GEAR ASSEMBLY
    12.
    发明申请
    SKID LANDING GEAR ASSEMBLY 审中-公开

    公开(公告)号：US20190248479A1

    公开(公告)日：2019-08-15

    申请号：US15894888

    申请日：2018-02-12

    Applicant: Bell Helicopter Textron Inc.

    Inventor： Michael R. Smith ,  John C. Larkin, III

    IPC: B64C25/52 ,  B64F5/00

    CPC classification number: B64C25/52 ,  B64C2025/325 ,  B64F5/00

    Abstract: An aspect provides a skid landing gear assembly including a cross member disposed between a first skid tube and a second skid tube, and a tension cable member configured to be disposed in the cross member; wherein the tension cable member resists outward deflection of at least a portion of the skid landing gear assembly when a downward load is applied to the skid landing gear assembly. In other aspects, there are methods of avoiding ground resonance in a skid landing gear assembly, methods of assembling a skid landing gear assembly, methods of operating a helicopter with a skid landing gear assembly, and methods of improving the service life of a skid landing gear assembly.

    ACTIVE VENT AND RE-INFLATION SYSTEM FOR A CRASH ATTENTUATION AIRBAG
    14.
    发明申请
    ACTIVE VENT AND RE-INFLATION SYSTEM FOR A CRASH ATTENTUATION AIRBAG 有权
    用于冲击安装气囊的主动通风和再充气系统

    公开(公告)号：US20150041584A1

    公开(公告)日：2015-02-12

    申请号：US14525947

    申请日：2014-10-28

    Applicant: BELL HELICOPTER TEXTRON INC.

    Inventor： Zi Lu ,  Cheng-Ho Tho ,  Michael R. Smith ,  Michael Seifert

    IPC: B64C25/56

    CPC classification number: B64D25/00 ,  B64D2201/00

    Abstract: A crash attenuation system has an airbag inflatable generally adjacent to an exterior of the aircraft. The system includes a gas generator in fluid communication with an interior of the airbag. The system also includes a vent system having a vent passage supported by the aircraft, the vent passage being configured to allow gas to escape from within the airbag during an impact to a second set of airbags for flotation. The vent system also includes an actuator door for sealing the vent passage, thereby preventing gas from leaving the airbag. The actuator door is actuated by an actuator, the actuator being in fluid communication with the gas generator through an actuator duct. The system operates such that deployment of gas from the gas generator causes the actuator to inflate, thereby causing the actuator door to seal the vent passage. The gas generator is configured to re-inflate the airbag after the actuator door seals the vent passage.

    Abstract translation: 碰撞衰减系统具有通常与飞机外部相邻的气囊充气。 该系统包括与气囊的内部流体连通的气体发生器。 该系统还包括具有由飞行器支撑的通气通道的通气系统，该排气通道构造成允许气体在冲击期间从气囊内逸出到用于浮选的第二组安全气囊。 排气系统还包括用于密封通气通道的致动器门，从而防止气体离开气囊。 致动器门由致动器致动，致动器通过致动器导管与气体发生器流体连通。 系统操作使得来自气体发生器的气体展开使致动器膨胀，从而使致动器门密封通气通道。 气体发生器构造成在致动器门密封通气通道之后再次充气气囊。

    Vibration Attenuator
    16.
    发明申请
    Vibration Attenuator 审中-公开

    公开(公告)号：US20190263512A1

    公开(公告)日：2019-08-29

    申请号：US16284931

    申请日：2019-02-25

    Applicant: Bell Helicopter Textron Inc.

    Inventor： David Heverly ,  Frank Bradley Stamps ,  Gary Miller ,  Richard E. Rauber ,  Thomas C. Parham, JR. ,  Michael R. Smith ,  Michael Scott Seifert ,  Jouyoung Jason Choi

    IPC: B64C27/00 ,  B06B1/16

    Abstract: A vibration attenuator for a rotor is rotatable about a mast axis and has a frame configured for rotation about the mast axis relative to the rotor. A first mass is axially translatable in a first direction relative to the frame parallel to a first axis, and a first biasing force urges the first mass toward a first-mass rest position in which the first mass is symmetric about the mast axis. A second mass is axially translatable in a second direction relative to the frame parallel to a second axis, and a second biasing force urges the second mass toward a second-mass rest position in which the second mass is symmetric about the mast axis. A selected first or second mass moves radially outward from the rest position to oppose vibrations in the rotor.

    ACTIVE VIBRATION ISOLATION WITH DIRECT FLUID ACTUATION
    20.
    发明申请
    ACTIVE VIBRATION ISOLATION WITH DIRECT FLUID ACTUATION 有权
    主动振动隔离与直接流体驱动

    公开(公告)号：US20160280363A1

    公开(公告)日：2016-09-29

    申请号：US14666574

    申请日：2015-03-24

    Applicant: Bell Helicopter Textron Inc.

    Inventor： David E. Heverly, II ,  Taeoh Lee ,  Michael R. Smith ,  James E. Wright

    IPC: B64C27/00 ,  F16F9/10 ,  F16F9/504

    CPC classification number: B64C27/001 ,  B64C2027/002 ,  B64C2027/004 ,  F16F7/1034 ,  F16F9/10 ,  F16F9/504 ,  F16F2222/08 ,  F16F2238/04

    Abstract: A method of isolating vibrations between vibrating bodies includes determining a pressure differential between a first fluid chamber and a second fluid chamber of a liquid inertia vibration eliminator (LIVE) unit, and selectively injecting fluid into or withdrawing fluid from the LIVE unit based on the pressure differential. A system for isolating vibrations between bodies includes a vibration isolator including fluid, a fluid regulator valve in fluid communication with the vibration isolator to selectively flow fluid through the vibration isolator, a pressurized fluid source in fluid communication with the fluid regulator to supply fluid to the fluid regulator, a controller in signal communication with the fluid regulator to control fluid flow between the fluid regulation valve and the vibration isolator, and at least one sensor in signal communication with the controller.

    Abstract translation: 隔离振动体之间的振动的方法包括确定液体惯性减振器（LIVE）单元的第一流体室和第二流体室之间的压力差，并且基于压力选择性地将流体从LIVE单元注入流体或从LIVE单元抽出流体 微分。 用于隔离主体之间的振动的系统包括：包括流体的隔振器，与隔振器流体连通的流体调节阀，以选择性地流动通过隔振器的流体;与流体调节器流体连通的加压流体源，以向 流体调节器，与流体调节器信号通信的控制器，以控制流体调节阀和隔振器之间的流体流动，以及与控制器信号通信的至少一个传感器。

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