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    • 23. 发明授权
    • Packing seal for reciprocating pump
    • 往复式泵的包装密封
    • US09016693B1
    • 2015-04-28
    • US13748892
    • 2013-01-24
    • FAST Group-Houston, Inc.
    • Lee ShekBrian JamesCathy G. EdgingtonScott SchuetteHung NguyenKurt Hayden
    • F16J15/00F16J15/16F04B39/00
    • F04B1/0448F04B47/00F04B53/02F04B53/143
    • A packing seal for a reciprocating pump of the type typically used in connection with oil and gas drilling operations is described. Generally, the seal includes a rigid L shaped cartridge that carries an outer wiper and an O-ring on an exterior wall and a recessed seal body on an interior wall. The recessed seal body is of dual durometer, and its lower portion is constantly urged against the cylinder wall in self-sealing fashion. The seals, cartridge and wiper may be formed from rigid and/or non-rigid materials having low coefficients of friction and physical properties comprising low abrasion and wear resistance. The seal provides an improved self-lubricated unitary seal that is convenient to replace in the field regardless of the torque delivered to the gland nut of a packing box, which contains the seal.
    • 描述了一般用于油气钻井操作的往复式泵的填料密封件。 通常,密封件包括刚性L形盒,其在外壁上承载外擦拭器和O形环,并在内壁上承载凹入的密封体。 凹形密封体具有双重硬度,并且其下部以自密封方式不断地推靠在气缸壁上。 密封件,筒和擦拭器可以由具有低摩擦系数和低磨损和耐磨性的物理性质的刚性和/或非刚性材料形成。 密封件提供改进的自润滑单一密封件,其在现场更换方便,而不管输送到包含密封件的包装盒的密封螺母的扭矩如何。
    • 28. 发明授权
    • Autonomous electro-optical framing camera system with constant ground
resolution, unmanned airborne vehicle therefor, and methods of use
    • 具有恒定地面分辨率的自动电光框架摄像机系统,无人机载机及其使用方法
    • US06130705A
    • 2000-10-10
    • US113392
    • 1998-07-10
    • Andre G. LareauStephen R. BeranBrian JamesJames P. QuinnJohn Lund
    • Andre G. LareauStephen R. BeranBrian JamesJames P. QuinnJohn Lund
    • G01C3/08G01C11/02H04N5/232H04N13/00
    • H04N5/23264G01C11/02G01C3/08H04N5/23248H04N5/23254H04N5/23287
    • An aerial reconnaissance system generates imagery of a scene that meets resolution or field of view objectives automatically and autonomously. In one embodiment, a passive method of automatically calculating range to the target from a sequence of airborne reconnaissance camera images is used. Range information is use for controlling the adjustment of a zoom lens to yield frame-to-frame target imagery that has a desired, e.g., constant, ground resolution or field of view at the center of the image despite rapid and significant aircraft altitude and attitude changes. Image to image digital correlation is used to determine the displacement of the target at the focal plane. Camera frame rate and aircraft INS/GPS information is used to accurately determine the frame to frame distance (baseline). The calculated range to target is then used to drive a zoom lens servo mechanism to the proper focal length to yield the desired resolution or field of view for the next image. The method may be performed based on parameters other than range, such as aircraft height and stand off distance.
    • 空中侦察系统自动和自主地生成满足解决方案或视野目标的场景的图像。 在一个实施例中,使用从空中侦察摄像机图像序列自动地计算到目标的范围的被动方法。 范围信息用于控制变焦镜头的调节,以产生在图像中心具有期望的,例如恒定的地面分辨率或视场的帧到目标图像,尽管飞行器的高度和姿态快速且显着 变化。 图像到图像数字相关用于确定目标在焦平面处的位移。 摄像机帧率和飞机INS / GPS信息用于准确确定帧到帧距离(基线)。 然后将计算出的目标范围用于将变焦镜头伺服机构驱动到适当的焦距,以产生下一图像的期望分辨率或视场。 该方法可以基于除了范围之外的参数,例如飞行器高度和离开距离来执行。