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    • 9. 发明授权
    • Pneumatic tire having zig-zag circumferential main grooves
    • 具有锯齿形周向主槽的气动轮胎
    • US06564841B2
    • 2003-05-20
    • US09881699
    • 2001-06-18
    • Yukio TozawaHiroshi Iizuka
    • Yukio TozawaHiroshi Iizuka
    • B60C1104
    • B60C11/042B60C11/0309B60C11/045B60C11/1323Y10S152/90
    • Disclosed is a pneumatic tire effectively controlling uneven wear occurring in the vicinity of a main groove even if a groove width of the main groove is narrowed due to change in tread radius during inflation. In the pneumatic tire, with regard to a zigzag-shaped main groove having the groove width narrowed during inflation among a plurality of main grooves provided on the tread surface, an inclination angle of a groove wall near the shoulder with respect to the tread surface is made relatively large in a bent portion near the shoulder, an inclination angle of a groove wall near the center with respect to the tread surface is made relatively large in a bent portion near the center, and regions where the inclination angles of the opposed groove walls are different from each other are uncontinuously arranged in the tire circumferential direction.
    • 公开了一种充气轮胎,其有效地控制在主槽附近发生的不均匀磨损,即使主膨胀槽的槽宽度由于充气期间的胎面半径的变化而变窄。 在充气轮胎中,对于在胎面上设置的多个主槽之间的通气宽度变窄的锯齿形主槽,相对于胎面表面的肩部附近的槽壁的倾斜角度为 在靠近肩部的弯曲部分中相对较大,相对于胎面表面的中心附近的槽壁的倾斜角度在靠近中心的弯曲部分中相对较大,并且相对的槽壁的倾斜角度的区域 彼此不同地沿轮胎周向不连续地布置。
    • 10. 发明授权
    • Video signal reproduction apparatus for chrominance signals
    • 用于色度信号的视频信号再现装置
    • US6160949A
    • 2000-12-12
    • US969410
    • 1997-11-07
    • Hiroshi Iizuka
    • Hiroshi Iizuka
    • H04N9/84H04N9/87H04N9/80
    • H04N9/87H04N9/84
    • A video signal reproduction apparatus reproduces a chrominance signal which has been converted to a low frequency band and recorded on a magnetic tape. The low frequency chrominance signal read out from the magnetic tape is first subjected to phase recovery processing. Then, frequency conversion is carried out for the phase recovered chrominance signal to generate a reproduced chrominance signal. Thus, phase recovery is carried out prior to frequency conversion, and an oscillation signal can be directly supplied to the frequency converter from a voltage controlled oscillator in a phase controller, thereby achieving an accurate frequency conversion. This structure allows an extra frequency converter or a complicated band pass filter to be omitted.
    • 视频信号再现装置再现已被转换为低频带并记录在磁带上的色度信号。 首先对从磁带读出的低频彩色信号进行相位恢复处理。 然后,对相位恢复的色度信号进行频率转换,以产生再现的色度信号。 因此,在变频之前进行相位恢复,并且可以从相位控制器中的压控振荡器将振荡信号直接提供给变频器,从而实现精确的频率转换。 这种结构允许省略额外的变频器或复杂的带通滤波器。