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    • 4. 发明公开
    • Pneumatic brake actuator with flow insensitive two way control valve
    • Bre atis il il il il il il il il il il il il il il il il il il
    • EP2662254A1
    • 2013-11-13
    • EP13159285.9
    • 2013-03-14
    • Haldex Brake Products Corporation
    • Fisher, Albert D.Bradford, Aaron C.
    • B60T17/08F16D65/14
    • B60T17/083F16D65/28F16D2121/08F16D2121/10F16D2121/14F16D2123/00
    • A pneumatic brake actuator has a spring brake actuator with spring and spring brake pressure chambers, and a service brake actuator with service brake pressure and pushrod chambers. A control valve has a seal that is moveable between an open position and a closed position for regulating fluid flow between the spring chamber and service brake pressure chamber. A first surface of the seal is in fluid communication with the service brake pressure chamber and a second surface of the seal is in fluid communication with a valve chamber that is not in fluid communication with the service brake pressure chamber or spring chamber. The seal moves between its open and closed positions based on a pressure in the service brake pressure chamber. Movement of the seal is not dependent on the rate of flow of fluid between the spring chamber and the service brake pressure chamber.
    • 气动制动器执行器具有弹簧制动器致动器,其具有弹簧和弹簧制动压力室,以及具有工作制动压力和推杆室的行车制动器致动器。 控制阀具有能够在打开位置和关闭位置之间移动的密封件,用于调节弹簧室和工作制动压力室之间的流体流动。 密封件的第一表面与工作制动压力室流体连通,并且密封件的第二表面与不与工作制动压力室或弹簧室流体连通的阀室流体连通。 密封件基于工作制动压力室中的压力在其打开和关闭位置之间移动。 密封件的运动不依赖于弹簧室和工作制动压力室之间的流体流动速率。
    • 7. 发明公开
    • PNEUMATIC BRAKE ACTUATOR WITH FLOW INSENSITIVE TWO WAY CONTROL VALVE
    • 芝加哥麻醉科学研究所麻醉科学研究所ZWEIWEGREGELVENTIL
    • EP3173303A1
    • 2017-05-31
    • EP16205678.2
    • 2013-03-14
    • Haldex Brake Products Corporation
    • Fisher, Albert D.Bradford, Aaron C.
    • B60T17/08F16D65/14
    • B60T17/083F16D65/28F16D2121/08F16D2121/10F16D2121/14F16D2123/00
    • A pneumatic brake actuator comprising a spring brake actuator with a spring chamber and a spring brake pressure chamber, a service brake actuator coupled with the spring brake actuator including a service brake pressure chamber and a pushrod chamber, a valve body with an interior surface that defines a channel between the spring chamber and the service brake pressure chamber and a seal positioned within the channel in the valve body. The seal and the valve body enclose a valve chamber that is not in fluid communication with the spring chamber or the service brake pressure chamber. The seal is moveable between an open position, in which fluid can flow through the channel, and a closed position, in which fluid is blocked from flowing through the channel. The seal is biased to the open position and comprises a first sealing surface that engages the valve body, when the seal is in its closed position, as well as second and third sealing surfaces engaging the valve body to seal the valve chamber from the spring chamber and the service brake pressure chamber.
    • 一种气动制动致动器,包括具有弹簧室和弹簧制动器压力室的弹簧制动器致动器,与弹簧制动器致动器耦合的行车制动器致动器,其包括行车制动压力室和推杆室,阀体具有限定 弹簧室和工作制动压力室之间的通道以及位于阀体内的通道内的密封件。 密封件和阀体包围不与弹簧室或工作制动压力室流体连通的阀室。 密封件可以在流体可以流过通道的打开位置和闭合位置之间移动,在该位置中阻止流体流过通道。 密封件被偏压到打开位置,并且包括当密封件处于其关闭位置时接合阀体的第一密封表面以及接合阀体的第二和第三密封表面以将阀室与弹簧室密封 和行车制动压力室。