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    • 6. 发明授权
    • Turbofan engine having variable geometry fan duct
    • Turbofan发动机具有可变几何风扇管道
    • US4155221A
    • 1979-05-22
    • US754140
    • 1976-12-27
    • Louis G. DhooreWilliam H. Schultz
    • Louis G. DhooreWilliam H. Schultz
    • F02C7/045F04D29/68F02K3/06
    • F02C7/045F04D29/681
    • This invention is an improved turbofan engine having a variable geometry fan duct which reduces stator source noise emitted from the engine. Attached to the inner wall of the fan casing near the fan stators is a pneumatically actuated annular membrane having two operating positions. In the cruise position, the membrane is forced radially inward to press against the radially outermost tips of the fan stators. In the second position, used during approach and takeoff, the membrane is drawn against a recessed portion in the fan casing, thereby creating an annular passageway between the stator tips and the casing. When the membrane is in this position, turbulent flow from the rotor blade tips which would normally impinge on the stators is directed through the annular passageway.
    • 本发明是一种改进的涡轮风扇发动机,其具有可变几何形状的风扇管道,其减少了从发动机排出的定子源噪声。 在风扇定子附近的风扇壳体的内壁附近是具有两个操作位置的气动致动的环形膜。 在巡航位置,膜被径向向内压迫以抵抗风扇定子的径向最外端。 在第二位置,在接近和起飞期间使用的膜被拉到风扇壳体中的凹陷部分,从而在定子尖端和壳体之间形成环形通道。 当膜处于该位置时,来自转子叶片尖端的通常冲击定子的湍流被引导通过环形通道。
    • 7. 发明授权
    • plug retention system
    • 插头保持系统
    • US07125277B2
    • 2006-10-24
    • US10790361
    • 2004-03-01
    • Joseph Z. WascowRobert HollisJason SchickerlingWilliam H. SchultzPeter Domeny
    • Joseph Z. WascowRobert HollisJason SchickerlingWilliam H. SchultzPeter Domeny
    • H01R13/62
    • H01R13/72B25F5/00H01R13/5833H01R13/60H01R13/6392
    • A retaining system including a power cord retaining system and a cord plug retaining system for use with a power tool. The power cord retaining system is configured for accommodating an extension cord and includes a cord capture formation for retaining the extension cord disposed on the tool, and a cord channel disposed on the tool and configured for supporting a loop of the cord substantially along an arc defined by the loop. In the preferred embodiment, the cord capture formation defines an enclosed aperture for retaining the cord at two points, and the cord channel defines a semi-circular arc for supporting the cord loop substantially along its apex. The plug retaining system is configured for maintaining electrical continuity between the plug and the receptacle and includes a contact portion for engaging a plug or a cord, and an attachment device for attaching the contact portion to the tool.
    • 一种保持系统,包括电源线保持系统和用于电动工具的电缆插头保持系统。 电源线保持系统被配置为容纳延长线,并且包括用于保持设置在工具上的延长线的绳索捕获结构,以及设置在工具上并被配置用于基本上沿着定义的弧线支撑绳索的绳索的绳索通道 循环。 在优选实施例中,绳索捕获形式限定用于将绳索保持在两个点处的封闭孔,并且绳索通道限定用于基本上沿其顶点支撑绳索环的半圆弧。 插头保持系统被配置为保持插头和插座之间的电连续性,并且包括用于接合插头或电线的接触部分和用于将接触部分附接到工具的附接装置。