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1. 发明授权

US5350152A Displacement controlled hydraulic proportional valve 失效
标题翻译：位移控制液压比例阀
公开(公告)号：US5350152A
公开(公告)日：1994-09-27
申请号：US172981
申请日：1993-12-27
申请人： Eric A. Hutchison , John J. Krone
发明人： Eric A. Hutchison , John J. Krone
IPC分类号： F15B13/043 , F16K31/42
CPC分类号： F15B13/0435 , F15B13/043 , F15B13/0433 , Y10T137/86614
摘要： A displacement controlled hydraulic proportional valve has a spring retainer and a force feedback spring serially disposed between a pilot valve spool and a main valve spool in a control chamber. An arcuate convex end portion on the pilot valve spool extends into a cylindrical pocket in the spring retainer essentially defining a contact point through which force is transferred between the pilot valve spool and the retainer. The point contact minimizes side loading on the pilot valve spool due to buckling of the feedback spring to minimize tendency of the pilot valve spool to stick during operation.
摘要翻译：位移控制液压比例阀具有弹簧保持器和力反馈弹簧，其串联地布置在控制室中的先导阀阀芯和主阀阀芯之间。先导阀阀芯上的弧形凸端部分延伸到弹簧保持器中的圆柱形凹穴中，基本上限定了一个接触点，通过该接触点在先导阀阀芯和保持器之间传递力。点接触使得由于反馈弹簧的弯曲导致先导阀阀芯上的侧向负载最小化，以最小化先导阀阀芯在运行期间粘滞的倾向。

2. 发明授权

US5189940A Method and apparatus for controlling an implement 失效
标题翻译：用于控制实施的方法和装置
公开(公告)号：US5189940A
公开(公告)日：1993-03-02
申请号：US759390
申请日：1991-09-13
申请人： Javad Hosseini , Eric A. Hutchison , Randall M. Mitchell , Weldon L. Phelps , James E. Schimpf
发明人： Javad Hosseini , Eric A. Hutchison , Randall M. Mitchell , Weldon L. Phelps , James E. Schimpf
IPC分类号： E02F3/43 , E02F9/22 , F15B11/00
CPC分类号： E02F9/2217 , E02F9/2214
摘要： Vehicles having implements are typically used to perform repetitive functions in work cycles. An implement control system raises and lowers an implement relative to the vehicle and reduces the stresses applied to the vehicle from abruptly stopping the motion of the implement. A lever pilot signal is produced in response to the pivotal position of a control lever. An electrohydraulic pilot signal is also produced. The pilot signal having the greater pressure is directed to a main valve for controlling the position of the implement. The method and apparatus of the instant invention are applicable to a number of vehicles having a hydraulically operated implement.

3. 发明授权

US5642653A Method and apparatus for providing detents on an electronic control handle 失效
标题翻译：用于在电子控制手柄上提供棘爪的方法和装置
公开(公告)号：US5642653A
公开(公告)日：1997-07-01
申请号：US547049
申请日：1995-10-23
申请人： Eric A. Hutchison
发明人： Eric A. Hutchison
IPC分类号： E02F9/20 , F15B11/08 , F15B13/14 , F15B21/02 , G05B19/02 , F15B13/044
CPC分类号： E02F9/2025 , F15B13/14
摘要： An apparatus and method for providing a detent function on a hydraulic system. The hydraulic system includes a hydraulic implement movable between first and second implement positions. The apparatus and method receives a control input signal generated by an electronic control handle in response to operator input, monitors the control input signal, and actives a detent function if the control input signal follows a preset pattern. The preset pattern includes moving the handle to a detent area, between first and second positions, and then back to neutral, within a given time period. There is also a force feedback to the handle, opposing operator movement; which is proportional to the distance moved from neutral, and which has different attributes within and outside the detect area.
摘要翻译：一种用于在液压系统上提供制动功能的装置和方法。液压系统包括可在第一和第二工具位置之间移动的液压工具。该装置和方法响应于操作者输入接收由电子控制手柄产生的控制输入信号，监视控制输入信号，并且如果控制输入信号遵循预设模式则激活定位功能。预设模式包括在给定的时间段内将手柄移动到第一和第二位置之间的制动区域，然后回到空档。还有一个力量反馈给手柄，反对操作者的运动; 其与从中性移动的距离成比例，并且在检测区域内外具有不同的属性。

4. 发明授权

US5316044A Hydraulic control valve having a centering spring device 失效
标题翻译：液压控制阀具有定心弹簧装置
公开(公告)号：US5316044A
公开(公告)日：1994-05-31
申请号：US986317
申请日：1992-12-07
申请人： John F. Szentes , Daniel E. Zimmermann , David C. Mack , Eric A. Hutchison
发明人： John F. Szentes , Daniel E. Zimmermann , David C. Mack , Eric A. Hutchison
IPC分类号： F15B13/04 , F15B13/044
CPC分类号： F15B13/044 , F15B13/0402 , Y10T137/86622 , Y10T137/8671
摘要： Centering spring devices are useful in hydraulic control valves for returning the valve to the neutral position under both normal and abnormal operating conditions. Since the actuator moving the valve spool must work against the spring centering device, electrically actuated hydraulic valves have been limited to small sizes. The subject hydraulic control valve incorporates a centering spring device that can be controllably disabled so that the valve spool can be freely moved between the neutral and operating positions. In one embodiment, a centering spring is disabled by hydraulically moving the spring retainers toward each other to compress the spring with hydraulic fluid controlled by a solenoid valve. Maintaining the spring in a compressed condition permits the valve spool to be moved with a smaller actuator thereby making it feasible to control the valve position with an electrical actuator.
摘要翻译：定心弹簧装置可用于液压控制阀，用于在正常和异常运行条件下将阀返回到中性位置。由于执行器移动阀芯必须抵抗弹簧定心装置，电动液压阀已经被限制在小尺寸。本液压控制阀包括一个定心弹簧装置，该定心弹簧装置可以被可控地禁用，使得阀芯能够在空档和操作位置之间自由移动。在一个实施例中，通过使弹簧保持器朝向彼此液压地移动以通过由电磁阀控制的液压流体来压缩弹簧而使得定心弹簧被禁用。将弹簧保持在压缩状态允许阀芯用较小的致动器移动，从而使得可以用电致动器控制阀位置。

5. 发明授权

US5218895A Electrohydraulic control apparatus and method 失效
标题翻译：电动控制装置及方法
公开(公告)号：US5218895A
公开(公告)日：1993-06-15
申请号：US540726
申请日：1990-06-15
申请人： Michael S. Lukich , Eric A. Hutchison , Lisa A. Obermaier
发明人： Michael S. Lukich , Eric A. Hutchison , Lisa A. Obermaier
IPC分类号： E02F9/22 , F15B21/08
CPC分类号： E02F9/2214 , E02F9/2203 , F15B21/087
摘要： An apparatus, is adapted to controllably position a movable element in a hydraulic motor. A controller receives a request signal and velocity and/or position signals from sensors. The controller, in accordance with a control scheme using velocity and/or position feedback, determines the flow of hydraulic fluid to the cylinder needed to reduce velocity and/or position errors. A directional valve, actuated by an electrohydraulic pilot system, delivers hydraulic fluid to the hydraulic motor.
摘要翻译：一种装置适于将可移动元件可控地定位在液压马达中。控制器从传感器接收请求信号和速度和/或位置信号。控制器根据使用速度和/或位置反馈的控制方案确定降低速度和/或位置误差所需的液压流体到液压缸的流量。由电动液压先导系统驱动的方向阀将液压流体输送到液压马达。

6. 依法登记的发明

USH1191H Electromagnetically actuated spool valve 失效
公开(公告)号：USH1191H
公开(公告)日：1993-06-01
申请号：US812346
申请日：1991-12-23
申请人： Eric A. Hutchison , Michael S. Lukich
发明人： Eric A. Hutchison , Michael S. Lukich
IPC分类号： F15B9/03 , F15B13/04 , F15B13/044
CPC分类号： F15B9/03 , F15B13/0402 , F15B13/044 , F15B2013/0448
摘要： An apparatus is provided for controllably positioning a movable element within a hydraulic motor in response to a flow request signal. An electric circuit receives the flow request signal and responsively produces an energization signal. An electromagnetic actuator has a core, and a coil with a plurality of windings wound as a helix around the core. The coil is adapted to receive the energization signal and responsively produce a magnetic force proportional to the magnitude of the energization signal forcing the core to move bidirectionally relative to the coil. A mechanical coupling has one end connected to and movable with the core. A directional valve includes a spool connected to the other end of the mechanical coupling. The directional valve precisely meters pressurized fluid to the motor causing the movable element to move in response to the movement of the core.

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