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    • 86. 发明授权
    • Directional control valve for pneumatic cylinder
    • 气缸定向控制阀
    • US5065665A
    • 1991-11-19
    • US442210
    • 1989-11-28
    • Takashi Kimura
    • Takashi Kimura
    • F16K31/122F15B11/06F16K11/048F16K11/22F16K31/42
    • F15B11/06F15B2211/30525F15B2211/327F15B2211/329F15B2211/355F15B2211/6336F15B2211/6355F15B2211/67F15B2211/7052F15B2211/7053F15B2211/755F15B2211/8606F15B2211/8855Y10T137/86919Y10T137/87209
    • A directional control valve for a penumatic cylinder in which a piston of the cylinder can be lowered and elevated in a high speed with a minimum air consumption and the lowering/rising speed of the piston can be controlled before it reaches the upper/lower end portions to prevent bounding of the piston. The directional control valve includes a first pressure chamber communicating with an air supply, a second pressure chamber communicating with one of cylinder chambers divided by the piston of the cylinder, an exhaust pressure port, a pressure controlling mechanism, a pressure controlling and changing means which forms a pressure controlling chamber and a pressure receiving chamber, a first valve member for communicating the first pressure chamber and the second pressure chamber, a second valve member for communicating the second pressure chamber and an atmospheric pressure chamber, a third valve member for communicating the second pressure chamber and a pressure-receiving member, and a fourth valve member which is communicating with the third valve member, the air supply and a pressure control chamber.
    • 一种用于气缸的方向控制阀,其中气缸的活塞可以以最小的空气消耗高速降低并且升高,并且可以在其到达上/下端部之前控制活塞的下降/上升速度 以防止活塞的界限。 方向控制阀包括与空气源连通的第一压力室,与由气缸的活塞分隔的气缸室中的一个连通的第二压力室,排气压力端口,压力控制机构,压力控制和变更装置, 形成压力控制室和受压室,用于连通第一压力室和第二压力室的第一阀构件,用于连通第二压力室和大气压力室的第二阀构件,用于使第二压力室和第二压力室连通的第三阀构件 第二压力室和压力接收构件,以及与第三阀构件,空气供应和压力控制室连通的第四阀构件。
    • 88. 发明授权
    • System for controlling the driving of a stepper motor
    • 用于控制步进电机驱动的系统
    • US4988938A
    • 1991-01-29
    • US462067
    • 1990-01-08
    • Yukihiro ItoTakashi KimuraReiji Hoshika
    • Yukihiro ItoTakashi KimuraReiji Hoshika
    • H02P8/14H02P8/24H02P8/32
    • H02P8/24H02P8/32
    • A system for controlling the driving of a stepper motor which is rotated by the driving pulses generated based on the two-phase excitation system for rotating a driven system is disclosed herein comprises when the frequency of said driving pulses is outside of the resonance ranges of said stepper motor and some predetermined component parts of said driven system, respectively, the driving pulses generated based on said two-phase excitation system are applied to said stepper motor to rotate the same, but when the frequency of said driving pulses is within said resonance ranges, a brake pulse and a power suppression portion are added to said driving pulses so that said stepper motor is caused to rotate without causing resonance and can be stopped at a predetermined position with a high degree of accuracy and furthermore noise can be suppressed to a minimum.
    • 本文公开了一种用于控制由基于用于旋转从动系统的两相励磁系统产生的驱动脉冲旋转的步进电动机的驱动的系统,其包括当所述驱动脉冲的频率在所述 步进电动机和所述从动系统的一些预定的组成部分,将基于所述两相励磁系统产生的驱动脉冲施加到所述步进电动机以使其旋转,但是当所述驱动脉冲的频率在所述谐振范围内 制动脉冲和功率抑制部分被添加到所述驱动脉冲,使得所述步进电动机转动而不引起共振,并且可以以高精度停在预定位置,并且可以将噪声抑制到最小 。