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    Pilot pump bleed control for earthmoving scrapers
    1.
    发明授权
    Pilot pump bleed control for earthmoving scrapers 失效
    用于接地刮刀的引导泵排放控制

    公开(公告)号：US3862643A

    公开(公告)日：1975-01-28

    申请号：US33591073

    申请日：1973-02-26

    Applicant: CATERPILLAR TRACTOR CO

    Inventor： DEZELAN JOSEPH E ,  JESSEN HENRY J

    IPC: E02F3/85 ,  E02F9/22 ,  F15B13/042 ,  F15B20/00 ,  F16K11/07

    CPC classification number: E02F9/2267 ,  E02F9/2239 ,  E02F9/2285 ,  F15B13/0422 ,  F15B20/004 ,  Y10T137/86606 ,  Y10T137/8663 ,  Y10T137/86734

    Abstract: In an earthmoving scraper a low volume, low pressure, pilot pump supplies fluid pressure to a pilot control valve which routes this fluid through bleed lines to a remote scraper control valve that operates the bowl jacks on the scraper from a separate source of pressurized hydraulic fluid. By manually varying the bleed rates of the output of the pilot pump with the spool of the pilot valve, proportion actuation of the control valve can be obtained through differential pressures in the bleed lines connecting it to the pilot valve. A safety valve connected in the bowl carry circuit supplies an alternate source of fluid pressure to the pilot valve if the pilot pump fails, ensuring positive fail-safe operation of the system.

    Abstract translation: 在一个移土刮板中，低体积，低压的先导泵向先导控制阀提供流体压力，该先导控制阀通过排放管线将该流体引导到远程刮板控制阀，该远程刮刀控制阀从单独的加压液压流体源操作刮板上的碗形插口 。 通过用先导阀的阀芯手动改变先导泵的输出的排出速率，可以通过将其连接到先导阀的排放管中的差压来获得控制阀的比例致动。 如果先导泵发生故障，连接在碗托式回路中的安全阀向先导阀提供备用的流体压力源，确保系统正常的故障安全操作。

    Filter retainer and bypass valve assembly
    2.
    发明授权
    Filter retainer and bypass valve assembly 失效
    过滤器和旁通阀组件

    公开(公告)号：US3886072A

    公开(公告)日：1975-05-27

    申请号：US35547473

    申请日：1973-04-30

    Applicant: CATERPILLAR TRACTOR CO

    Inventor： DEZELAN JOSEPH E ,  JUNCK JOHN A ,  KROTH NEIL W

    IPC: B01D35/02 ,  B01D35/147 ,  B01D27/10

    CPC classification number: B01D35/147

    Abstract: A filter assembly includes a housing within which is disposed a filter element. Inlet means direct fluid to the filter, through which such fluid normally flows. The fluid then normally flows through outlet means defined by the housing. The fluid flowing through the inlet means is in communication with a valve including a valving element movable toward the filter element to allow fluid to flow from the inlet means to the outlet means, bypassing the filter element. A helical spring is disposed between the valving element and filter element to bias the valving element in a position so that the fluid is normally directed through the filter element. An increase of the fluid pressure in the filter element moves the valve element toward the filter element against the resilience of the spring, so that the fluid bypasses the filter element.

    Abstract translation: 过滤器组件包括其中设置有过滤元件的壳体。 入口意味着将流体直接流到过滤器，这种流体通过该过滤器正常流动。 然后，流体通常流过由壳体限定的出口装置。 流过入口装置的流体与包括可朝向过滤器元件移动的阀元件的阀连通，以允许流体从入口装置流到出口装置，从而绕过滤器元件。 螺旋弹簧设置在阀元件和过滤器元件之间，以将阀元件偏置在使得流体通常通过过滤元件的位置。 过滤元件中的流体压力的增加使得阀元件抵抗弹簧的弹性使过滤元件朝向过滤器元件移动，使得流体绕过过滤元件。

    Dual check valve arrangement
    4.
    发明授权
    Dual check valve arrangement 失效
    双检查阀安排

    公开(公告)号：US3866627A

    公开(公告)日：1975-02-18

    申请号：US37730073

    申请日：1973-07-09

    Applicant: CATERPILLAR TRACTOR CO

    Inventor： DEZELAN JOSEPH E

    IPC: F15B13/02 ,  F16K15/02

    CPC classification number: F15B13/02 ,  Y10T137/7845 ,  Y10T137/8671

    Abstract: A closed reservoir is connected to a pump for delivering pressurized hydraulic fluid to a directional control selector valve operatively connected to the ends of a double-acting hydraulic cylinder. A first check valve is positioned between the pump and the selector valve to pass pressurized hydraulic fluid thereby whereas a second check or make-up valve is telescopically mounted within the first check valve in exposed relationship to the hydraulic fluid contained in the reservoir. The make-up valve opens when the fluid pressure in the reservoir exceeds a predetermined level whereby such fluid is communicated therethrough and to the selector valve.

    Abstract translation: 封闭的储存器连接到泵，用于将加压的液压流体输送到可操作地连接到双作用液压缸的端部的方向控制选择阀。 第一止回阀位于泵和选择阀之间，以通过加压的液压流体，从而第二止回阀或补充阀可伸缩地安装在第一止回阀内，与储存器中包含的液压流体呈暴露关系。 当储存器中的流体压力超过预定水平时，补充阀打开，由此这种流体连通到其中并且连接到选择阀。

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