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    Method and apparatus for attenuating compressor noise
    1.
    发明授权
    Method and apparatus for attenuating compressor noise 有权
    用于衰减压缩机噪音的方法和装置

    公开(公告)号：US07527053B2

    公开(公告)日：2009-05-05

    申请号：US11088316

    申请日：2005-03-23

    申请人： Douglas F. DeVries ,  Malcolm R. Williams

    发明人： Douglas F. DeVries ,  Malcolm R. Williams

    IPC分类号： A61M16/00

    CPC分类号： A61M16/0057 ,  A61M16/0063 ,  A61M16/0066 ,  A61M16/0069 ,  A61M2205/42 ,  F04C18/126 ,  F04C29/061 ,  F04C29/065

    摘要： The invention comprises a method and apparatus for reducing the noise generated by compressors, including Roots-type blowers. The invention has particular use for reducing noise generated by compressors used in mechanical ventilators, though the advantages thereof may be realized in many different applications. One embodiment of the invention comprises a noise-attenuating gas flow path for a compressor contained in a portable ventilator housing. In one embodiment, the gas flow path comprises a plurality of chambers interconnected by flow tubes. The flow path is folded so as to fit into the limited space of a portable ventilator housing. The dimensions of the chambers and the flow tubes are selected so that an impedance mismatch is created between the chambers and the flow tubes. In one embodiment of the invention, the flow path comprises one or more perforated tubes located in one or more of the chambers. The perforated tube has a port through which gas is accepted and at least one exterior tube through which gas exits. Impedance mismatches are created between the inlet chamber and the exterior tubes and between the exterior tubes and the chamber in which the perforated tube is located, which are useful in attenuating noise. One embodiment of the invention comprises a noise attenuating mounting system for a compressor. The mounting system comprises flexible mounts that cooperate to dampen vibrations generated by the compressor.

    摘要翻译： 本发明包括一种减少压缩机产生的噪声的方法和装置，包括罗茨式鼓风机。 本发明特别用于降低在机械通风机中使用的压缩机产生的噪音，尽管其优点可以在许多不同的应用中实现。 本发明的一个实施例包括用于包含在便携式通风机壳体中的压缩机的噪声衰减气体流动路径。 在一个实施例中，气体流路包括通过流动管互连的多个室。 流路被折叠以便装配到便携式通风机壳体的有限空间中。 选择室和流管的尺寸，使得在腔室和流管之间产生阻抗失配。 在本发明的一个实施例中，流动路径包括位于一个或多个室中的一个或多个穿孔管。 多孔管具有可接受气体的端口和气体离开的至少一个外部管。 在入口室和外管之间以及外管和多孔管所在的室之间产生阻抗不匹配，这有助于衰减噪声。 本发明的一个实施例包括用于压缩机的噪声衰减安装系统。 安装系统包括柔性安装件，其配合以抑制由压缩机产生的振动。

    Ambient pressure air/oxygen blender
    3.
    发明授权
    Ambient pressure air/oxygen blender 失效
    环境压力空气/氧气搅拌器

    公开(公告)号：US5014694A

    公开(公告)日：1991-05-14

    申请号：US597054

    申请日：1990-10-15

    申请人： Douglas F. DeVries

    发明人： Douglas F. DeVries

    IPC分类号： A61M16/12

    CPC分类号： A61M16/12

    摘要： A gas blender for use with home ventilation equipment where pressurized oxygen is mixed with ambient air, in which a double ended poppet cooperates with two valve seats which are configured and orientated so that axial motion of the double ended poppet simultaneously opens both valves to maintain a constant flow ratio, or simultaneously closes both valves to maintain a constant flow ratio. One of the valve seats may be adjustably positioned to determine the initial flow ratio of gases through the valve seats.

    摘要翻译： 一种与家用通风设备一起使用的气体搅拌机，其中加压氧与环境空气混合，其中双端口提升阀与两个阀座配合并配置，使得两端阀座同时打开两个阀门以维持 恒定流量比，或同时关闭两个阀门以保持恒定的流量比。 阀座中的一个可以可调节地定位以确定通过阀座的气体的初始流量比。

    Mechanical ventilation system utilizing bias valve
    4.
    发明授权
    Mechanical ventilation system utilizing bias valve 有权
    利用偏压阀的机械通风系统

    公开(公告)号：US09126002B2

    公开(公告)日：2015-09-08

    申请号：US12975308

    申请日：2010-12-21

    申请人： Douglas F. DeVries ,  Todd Allum

    发明人： Douglas F. DeVries ,  Todd Allum

    IPC分类号： A61M16/20 ,  A61M16/00 ,  F04C18/12 ,  F04C28/24 ,  F04C29/00 ,  A61M16/08

    CPC分类号： A61M16/205 ,  A61M16/0003 ,  A61M16/0057 ,  A61M16/0066 ,  A61M16/0069 ,  A61M16/0833 ,  A61M16/107 ,  A61M16/208 ,  A61M2016/0021 ,  A61M2016/003 ,  A61M2016/0039 ,  A61M2205/3334 ,  A61M2205/42 ,  F04C18/126 ,  F04C28/24 ,  F04C29/0035 ,  F04C2220/24

    摘要： A portable mechanical ventilator having a Roots blower is configured to provide a desired gas flow and pressure to a patient circuit. The mechanical ventilator includes a flow meter operative to measure gas flow produced by the Roots blower and an exhalation control module configured to operate an exhalation valve connected to the patient circuit. A bias valve connected between the Roots blower and the patient circuit is specifically configured to generate a bias pressure relative to the patient circuit pressure at the exhalation control module. The bias valve is further configured to attenuate pulsating gas flow produced by the Roots blower such that gas flowing to the mass flow meter exhibits a substantially constant pressure characteristic. The bias pressure facilitates closing of the exhalation valve at the start of inspiration, regulates positive end expiratory pressure during exhalation, and purges sense lines via a pressure transducer module.

    摘要翻译： 具有罗茨鼓风机的便携式机械呼吸机被配置为向患者回路提供所需的气流和压力。 机械呼吸机包括一个可测量由罗茨鼓风机产生的气流的流量计和一个配置成操作连接到患者回路的呼气阀的呼出控制模块。 连接在罗茨鼓风机和患者回路之间的偏压阀被特别地构造成产生相对于呼气控制模块处的患者回路压力的偏压。 偏压阀进一步构造成衰减由罗茨鼓风机产生的脉动气流，使得流到质量流量计的气体表现出基本恒定的压力特性。 偏压有助于在呼吸开始时关闭呼气阀，调节呼气期间的呼气末正压，并通过压力传感器模块清除感测线。

    Ventilator exhalation valve
    7.
    发明授权
    Ventilator exhalation valve 失效
    通风阀排气阀

    公开(公告)号：US5127400A

    公开(公告)日：1992-07-07

    申请号：US498207

    申请日：1990-03-23

    申请人： Douglas F. DeVries ,  Malcolm R. Williams ,  J. Kelly Dack ,  Randy P. Hagen ,  Darrell W. Guillaume

    发明人： Douglas F. DeVries ,  Malcolm R. Williams ,  J. Kelly Dack ,  Randy P. Hagen ,  Darrell W. Guillaume

    IPC分类号： A61M16/00 ,  A61M16/20

    CPC分类号： A61M16/20 ,  A61M16/0069 ,  A61M16/205

    摘要： A ventilator exhalation valve for controlling the exhalation flow rate and pressure is disclosed. The valve includes a free-floating diaphragm which is biased against a fixed valve seat in an inhalation configuration of the valve so as to prevent flow through the valve in the reverse direction. As flow in the forward direction passes through the valve, the bias urging the diaphragm onto the valve seat is overcome and the diaphragm is separated from the valve seat, so as to contact a poppet affixed to a shaft. The shaft includes a ferromagnetic portion and is attached to linear actuator which is retained by substantially frictionless suspension system including a pair of substantially planar spring flexures. As the poppet moves in response to flow between the fixed valve seat and the diaphragm, ferromagnetic portion of the shaft is displaced relative to a fixed coil thereby inducing a current in a coil. The current is monitored to provide a feedback signal corresponding to the velocity of the poppet. The feedback signal may be used by a control mechanism to increase the pressure stability of the valve.

    摘要翻译： 公开了一种用于控制呼气流量和压力的呼吸机呼气阀。 该阀包括一个自由浮动的隔膜，其以阀的吸入构型偏压固定的阀座，以防止反向流过该阀。 当前进方向的流动通过阀时，克服将隔膜推到阀座上的偏压，并且隔膜与阀座分离，以便接触固定在轴上的提升阀。 轴包括铁磁部分并且被附接到线性致动器，线性致动器由基本上无摩擦的悬挂系统保持，包括一对基本平坦的弹簧挠曲。 当提升阀响应于固定阀座和隔膜之间的流动而移动时，轴的铁磁部分相对于固定线圈移位，从而引起线圈中的电流。 监测电流以提供对应于提升阀速度的反馈信号。 反馈信号可以由控制机构使用以增加阀的压力稳定性。