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    • 53. 发明授权
    • Impeller for water pump
    • 水泵叶轮
    • US06712583B2
    • 2004-03-30
    • US10123519
    • 2002-04-17
    • Toshiro IjimaRyouhei AdachiFei SongSatoshi Maruyama
    • Toshiro IjimaRyouhei AdachiFei SongSatoshi Maruyama
    • F04D2920
    • F04D29/2227F05D2300/10F05D2300/43
    • An impeller for a water pump includes an impeller main body composed of a synthetic resin and having a vane member formed around a rotating center portion; and a metal boss in which a circular boss member positioned on the forward side of the rotating center portion and provided with a gradually narrowing portion at the axial end thereof, and a periaxial support boss member positioned on the rearward side of the rotating center portion are consecutively formed in the axial direction, and in which an axial support surface is formed between the circular boss member and periaxial support boss member, the metal boss being insert-fitted into said rotating center portion.
    • 一种用于水泵的叶轮,包括由合成树脂构成的叶轮主体,并具有围绕旋转中心部分形成的叶片构件; 以及金属凸台,其中位于旋转中心部分的前侧上的圆形凸台构件在其轴向端部处设置有逐渐变窄的部分,并且位于旋转中心部分的后侧的轴向支撑凸台构件是 在轴向方向上连续地形成轴向支撑表面,并且在圆形凸起构件和轴向支撑凸台构件之间形成有轴向支撑表面,金属凸台嵌入到所述旋转中心部分中。
    • 55. 发明授权
    • Feedforward amplifier
    • 前馈放大器
    • US5898339A
    • 1999-04-27
    • US912687
    • 1997-08-18
    • Satoshi MaruyamaTokihiro MiyoFumihiko KobayashiAkira Seino
    • Satoshi MaruyamaTokihiro MiyoFumihiko KobayashiAkira Seino
    • H03F1/32H04J1/00H03F1/26
    • H03F1/3235
    • A feedforward amplifier having a distortion detection loop and a distortion elimination loop is provided that achieves increased accuracy, improved response, and stable operation. A variable attenuator is placed in front of a detector in a loop output stage, and the amount of attenuation in the variable attenuator is set large during a transient response period during the rising of the amplifier, and set small during a steady-state condition. The detection of the transition to the steady-state condition is accomplished, for example, by comparing the detector output with a prescribed threshold value. The width of perturbation is set large during a transient response period, and set small during a steady-state condition.
    • 提供具有失真检测回路和失真消除回路的前馈放大器,其实现了增加的精度,改进的响应和稳定的操作。 可变衰减器放置在环路输出级中的检测器的前面,并且在放大器的上升期间的瞬态响应周期期间可变衰减器中的衰减量被设置得很大,并且在稳态条件期间设置得较小。 例如,通过将检测器输出与规定的阈值进行比较来实现向稳态条件的转变的检测。 在瞬态响应期间扰动宽度设置较大,在稳态条件下设置较小。