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    Segmented valve spool
    1.
    发明授权
    Segmented valve spool 失效
    SEGMENTED VALVE SPOOL

    公开(公告)号：US3625254A

    公开(公告)日：1971-12-07

    申请号：US3625254D

    申请日：1970-03-12

    Applicant: CATERPILLAR TRACTOR CO

    Inventor： RICE ROGER A

    IPC: F15B13/04 ,  F16K11/07

    CPC classification number: F15B13/0402 ,  Y10T137/8663

    Abstract: A segmented valve spool in a fluid control valve permitting very accurate control over spacing between various portions of the spool. The segmented spool portions are selectively separated by shims with resilient means such as springs urging the spool segments toward each other. To avoid binding of the segmented spool within a spool bore, each shim assembly includes a tapered member or ball to establish point contact between each pair of adjacent spool segments.

    Filter system for hydraulic circuit
    2.
    发明授权
    Filter system for hydraulic circuit 失效
    液压电路滤波系统

    公开(公告)号：US3572508A

    公开(公告)日：1971-03-30

    申请号：US3572508D

    申请日：1969-06-30

    Applicant: CATERPILLAR TRACTOR CO

    Inventor： RICE ROGER A

    IPC: B01D29/23 ,  B01D35/027 ,  B01D35/147 ,  B01D35/14 ,  B01D35/02

    CPC classification number: B01D35/147 ,  B01D29/23 ,  B01D35/0273 ,  B01D2201/0407

    Abstract: A hydraulic circuit including a reservoir, a pump for withdrawing fluid therefrom and for directing it under pressure through a control valve and to a hydraulic motor and means for directing return fluid back to the reservoir and through a filter which is disposed entirely within the reservoir. The filter has no external fluidtight housing and fluid is filtered by passing outwardly through a hollow filter unit so that the filtered fluid passes at relatively low pressure and velocity into the body of fluid in the reservoir to avoid agitating and aeration of the fluid supply therein.

    Hydraulic control valve for fluid suspension system
    7.
    发明授权
    Hydraulic control valve for fluid suspension system 失效
    液力悬挂系统液压控制阀

    公开(公告)号：US3865135A

    公开(公告)日：1975-02-11

    申请号：US40430973

    申请日：1973-10-09

    Applicant: CATERPILLAR TRACTOR CO

    Inventor： MCWILLIAMS ORCENITH D ,  RICE ROGER A

    IPC: B62D53/02 ,  B60D1/00 ,  F16K11/00

    CPC classification number: B62D53/021 ,  Y10T137/87193 ,  Y10T137/87225

    Abstract: A hydraulic control valve including a valve body having an inlet port, first and second outlet ports and a return port with a first movable valve element for selectively and alternately communicating the inlet port with the first outlet port and the return port and a second movable valve element for selectively controlling communication between the first and second outlet ports and a third movable valve element for selectively controlling communication of the second outlet port with the return port when communication between the outlet ports is blocked.

    Abstract translation: 一种液压控制阀，包括具有入口端口的阀体，第一和第二出口端口以及具有用于选择性地并且交替地将入口与第一出口和返回端口连通的第一可移动阀元件的返回端口和第二可移动阀 元件，用于选择性地控制第一和第二出口之间的连通;以及第三可移动阀元件，用于当出口之间的连通被阻塞时，选择性地控制第二出口与回流口的连通。

    Automatic positioning systems for scraper elevators
    8.
    发明授权
    Automatic positioning systems for scraper elevators 失效
    自动定位系统用于刮刀电梯

    公开(公告)号：US3653132A

    公开(公告)日：1972-04-04

    申请号：US3653132D

    申请日：1970-07-30

    Applicant: CATERPILLAR TRACTOR CO

    Inventor： CAMPBELL TREVAR G ,  LARSON ROBERT V ,  STAHL SEBALD K ,  LIESS RICHARD K ,  RICE ROGER A

    IPC: E02F3/64 ,  E02F3/65 ,  E02F3/08

    CPC classification number: E02F3/655 ,  E02F3/64 ,  E02F3/6481 ,  E02F3/651

    Abstract: The elevator of a self-loading earth-moving scraper is moveable as a unit relative to the bowl thereof and automatic controls are provided which shift the elevator at predetermined stages in the operating cycle of the scraper. The automatic controls operate by sensing forces which react on other components of the scraper and which are indicative of the need for shifting the elevator. The elevator may, for example, pivot gradually upward as loading progresses or may be raised substantially prior to load ejection without requiring control of these movements by the operator.

    Abstract translation: 自载式土铲装置的升降机作为一个单元可相对于其碗移动，并且提供了自动控制装置，其将电梯在刮刀的操作循环中的预定阶段移动。 自动控制器通过感测对刮板的其它部件作出反应的力并且指示需要移动电梯来操作。 例如，升降机可以在装载进行时逐渐向上枢转，或者可以在加载弹出之前基本上升高，而不需要操作者控制这些运动。

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