公开(公告)号：US06637200B2

公开(公告)日：2003-10-28

申请号：US10033093

申请日：2001-10-19

Applicant: Valentin Barba ,  Khoi T. Vu

Inventor： Valentin Barba ,  Khoi T. Vu

IPC: F16D3102

CPC classification number: F15B15/12 ,  F04B43/046 ,  F15B15/18

Abstract: A hydraulic actuator that is capable of substantial actuation but does not require a conventional pump, uses only deflectable membranes and passive valves, or, at most, a minimum of active valves, and, under certain circumstances, may be free to move when the actuator is de-energized, is provided. The actuator utilizes the deflectable membranes to move fluid throughout the actuator. The movement of the fluid actuates a shaft or other suitable device, as required.

Abstract translation: 能够基本致动但不需要常规泵的液压致动器仅使用可偏转的膜和被动阀，或者至多使用最少的主动阀，并且在某些情况下，当致动器 被断电。 致动器利用可偏转的膜来移动整个致动器的流体。 根据需要，流体的运动致动轴或其它合适的装置。

公开(公告)号：US5937990A

公开(公告)日：1999-08-17

申请号：US28649

申请日：1998-02-24

Applicant: Anthony J. DiGiacomo ,  Shijie Liu ,  Khoi T. Vu ,  Alfred K. Tengan ,  Robert L. Kowalski

Inventor： Anthony J. DiGiacomo ,  Shijie Liu ,  Khoi T. Vu ,  Alfred K. Tengan ,  Robert L. Kowalski

IPC: F16D55/00 ,  F16D55/36 ,  F16D59/02 ,  F16D65/14 ,  F16D65/46 ,  F16D67/00

CPC classification number: F16D65/46 ,  F16D55/36 ,  F16D59/02 ,  F16D2055/0058 ,  F16D2065/1368 ,  F16D2125/36 ,  F16D2127/10

Abstract: A transmission with a load brake has a ball spline and a stabilizer ring for reducing chatter, a seal for preventing leakage, and an adjustment mechanism for extending the effective life of the brake disk stack. In the past, transmissions equipped with Weston brakes have experienced significant problems with instability and chatter. The present invention overcomes the problems of instability and chatter by introducing a ball spline at the junction between the output shaft and the loading assembly. The ball spline reduces friction caused by the axial movement of the output cam of the loading assembly. Also, the invention introduces a stabilizer ring around the loading assembly to reduce instability and chatter caused by the angular and transverse movement of the loading assembly. The invention also may also utilize a fluid damper in place of the stabilizer ring to reduce instability and chatter caused by the angular and transverse movement of the loading assembly. The invention substantially reduces leakage of transmission fluid by placing a seal including two sealing members around the opening in the casing of the transmission through which the output shaft passes. A layer of relatively high-viscosity grease is introduced between the two sealing members to provide a dam against leakage of transmission fluid. An adjustment mechanism may be used to reconfigure the brake disk stack to its original settings after a pre-determined number of cycles of use of the transmission.

Abstract translation: 具有负载制动器的变速器具有用于减小颤动的滚珠花键和稳定环，用于防止泄漏的密封，以及用于延长制动盘组的有效寿命的调节机构。 过去，配备威斯顿制动器的变速箱遇到了不稳定和喋喋不休的重大问题。 本发明通过在输出轴和装载组件之间的接合处引入滚珠花键来克服不稳定和颤动的问题。 滚珠花键减少由装载组件的输出凸轮的轴向运动引起的摩擦。 此外，本发明还引入围绕装载组件的稳定器环，以减少由装载组件的角度和横向运动引起的不稳定性和颤动。 本发明还可以使用流体阻尼器来代替稳定器环，以减少由装载组件的角度和横向运动引起的不稳定性和颤动。 本发明通过将包括两个密封构件的密封件放置在输出轴通过的变速器的壳体中的开口周围而大大减少了传动液的泄漏。 在两个密封构件之间引入一层相对高粘度的润滑脂，以提供防止传输流体泄漏的阻力。 在使用传输的预定次数之后，可以使用调节机构将制动盘堆叠重新配置到其原始设置。

公开(公告)号：US06448793B1

公开(公告)日：2002-09-10

申请号：US09545128

申请日：2000-04-07

Applicant: Curtis A. Barratt ,  Jon D. Jorgenson ,  Khoi T. Vu

Inventor： Curtis A. Barratt ,  Jon D. Jorgenson ,  Khoi T. Vu

IPC: G01R2708

CPC classification number: H01L22/20

Abstract: The present invention relates to a process for implementing a base circuit design with configurable modifications to compensate for variations in component parameters due to material or processing characteristics. During the fabrication process, the base circuit is electrically tested to determine the characteristics of the base circuit given the materials and processes used to implement the circuit. Based on the testing, subsequent processing steps are used to modify the base circuit as necessary to compensate for variations in the circuit or component parameters due to the material or processing characteristics. Preferably, the base circuit includes hetero-junction bipolar transistors and the in-process testing is used to determine an associated beta value for the transistor. Based upon the determined beta value, the circuit is modified during processing to insure proper quiescent currents occur during normal operation given the beta of the transistor. Preferably, a top level mask is used to select the resistance in the base current path to select the proper base current for a desired quiescent collector current.

Abstract translation: 本发明涉及用于实现具有可配置修改的基本电路设计以补偿由于材料或处理特性引起的部件参数变化的过程。 在制造过程中，给定用于实施电路的材料和工艺的基础电路进行电测试以确定基极电路的特性。 基于测试，随后的处理步骤用于根据材料或处理特性来修改基本电路以补偿电路或部件参数的变化。优选地，基极电路包括异质结双极晶体管， 过程测试用于确定晶体管的相关beta值。 基于确定的β值，在处理期间修改电路，以确保在给定晶体管的β的正常操作期间发生适当的静态电流。 优选地，使用顶级掩模来选择基极电流路径中的电阻，以便为期望的静态集电极电流选择合适的基极电流。

公开(公告)号：US06779758B2

公开(公告)日：2004-08-24

申请号：US10431024

申请日：2003-05-06

Applicant: Khoi T. Vu ,  Valentin G. Barba

Inventor： Khoi T. Vu ,  Valentin G. Barba

IPC: B64D3700

CPC classification number: B64D39/02 ,  B64D39/00

Abstract: A boom deploy actuator with improved maintainability and simplicity has an electric motor and control circuitry for selectively powering the motor to develop torque with either rotational direction for rotating a capstan to vary the length of a boom cord extending from the capstan to a boom. In a preferred embodiment, the motor is a brushless electric motor. The control circuitry preferably includes circuit components for limiting the speed of the motor.

Abstract translation: 具有改进的可维护性和简单性的悬臂部署致动器具有电动马达和控制电路，用于选择性地为马达提供动力以利用用于旋转绞盘的旋转方向产生扭矩，以改变从绞盘延伸到起重臂的悬臂绳索的长度。 在优选实施例中，电动机是无刷电动机。 控制电路优选地包括用于限制电动机的速度的电路部件。