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    • 92. 发明授权
    • Tubular access ladder and method
    • 管状梯子和方法
    • US07967110B2
    • 2011-06-28
    • US11494217
    • 2006-07-27
    • Thomas W. Parker
    • Thomas W. Parker
    • E06C9/02
    • E06C1/125E04F11/068E06C9/08
    • An access ladder includes a plurality of sections connected together to telescope between an extended position and a retracted position that has an increasing reactive force to counterbalance the weight of the sections as they extend. A method for accessing a room with a ladder connected to a ceiling including the steps of moving the ladder to a fully extended position subject to an increasingly active force to counterbalance the weight of the ladder as it extends. There is the step of retracting the ladder into a retracted position in the ceiling.
    • 进入梯子包括连接在一起以在延伸位置和缩回位置之间伸缩的多个部分,该延伸位置和缩回位置具有增加的反作用力,以在它们延伸时抵抗部分的重量。 一种用于连接天花板的梯子进入房间的方法,其特征在于包括步骤:梯子运动到达完全延伸的位置,受到越来越大的作用力,以抵抗梯子在其延伸时的重量。 有一个步骤是将梯子缩回到天花板的缩回位置。
    • 93. 发明申请
    • Pump jack crank and method
    • 泵千斤顶曲柄和方法
    • US20110132132A1
    • 2011-06-09
    • US12931588
    • 2011-02-05
    • Thomas W. Parker
    • Thomas W. Parker
    • G05G1/08
    • G05G1/085B66F13/00G05G1/082Y10T70/5624Y10T74/20474Y10T74/20744Y10T403/32861Y10T403/32918Y10T403/7045
    • An apparatus for cranking a shackle of a pump jack. The apparatus includes a shaft which fits through the shackle. The apparatus includes an arm rotatably attached to the shaft in proximity to a first end of an arm. The apparatus includes a handle for cranking the shaft. The handle having a locked state in which the handle is unable to rotate the shaft, and an unlocked state in which the handle is able to rotate the shaft. The handle attached to the arm in proximity to a second end of the arm. The handle extending essentially perpendicularly from the arm. The apparatus includes a locking mechanism engaging the arm at a pivot point and the shaft, the locking mechanism placing the handle in the locked state or the unlocked state by moving the arm about the pivot point to a first position where the handle extends inward toward the shackle or a second position where the handle extends outward away from the shackle, respectively. A method for cranking a shackle of a pump jack.
    • 用于起动泵千斤顶卸扣的装置。 该装置包括通过该钩环配合的轴。 该装置包括可旋转地附接到轴的臂,靠近臂的第一端。 该装置包括用于起动轴的把手。 手柄具有手柄不能旋转轴的锁定状态,以及手柄能够旋转轴的解锁状态。 手柄附接到手臂的第二端附近。 手柄基本垂直于手臂延伸。 所述装置包括锁定机构,所述锁定机构在枢转点处与所述臂接合所述轴,所述锁定机构通过将所述臂绕所述枢轴点移动到所述手柄向内朝向所述第一位置而将所述手柄置于锁定状态或所述解锁状态 手柄或第二位置,其中手柄分别从钩环向外延伸离开。 用于起动泵千斤顶卸扣的方法。
    • 97. 发明授权
    • Reversing valve and method
    • 换向阀和方法
    • US5878781A
    • 1999-03-09
    • US467295
    • 1995-06-06
    • Thomas W. Parker
    • Thomas W. Parker
    • F16K31/42F16K11/074F16K17/22F16K31/06F16K39/04F25B41/04F16K11/08
    • F16K11/0743F16K39/045F25B41/046Y10T137/0318Y10T137/86839
    • A reversing valve for a vapor compression refrigeration system comprising a housing defining a chamber with a high pressure port, a low pressure port and first and second system ports opening into said chamber through a chamber wall; a valve member disposed in the housing for shifting movement generally parallel to the wall between a first position wherein the valve member communicates the low pressure port with the first system port while communicating the high pressure port with the second system port and a second position wherein the valve member communicates the low pressure port with the second system port while communicating the high pressure port with the first system port, the valve member blocking communication between the high and low pressure ports when in the first and second positions; the valve member subjected to a net differential pressure force acting to firmly seat the valve member in the first or second position for preventing leakage between the high pressure port and the low pressure port; and, an actuator for reversing the direction of the net differential pressure force acting on the valve member to unseat the valve member and move it away from its first or second position for facilitating the shifting movement to the other position.
    • 一种用于蒸汽压缩制冷系统的换向阀,包括限定具有高压端口的室的壳体,低压端口以及通过室壁打开到所述室中的第一和第二系统端口; 阀构件,设置在所述壳体中,用于在第一位置和第二位置之间平移于大体平行于所述壁的第一位置移动,所述第一位置在所述阀构件将所述低压端口与所述第一系统端口连通,同时使所述高压端口与所述第二系统端口连通, 阀构件将低压端口与第二系统端口连通,同时将高压端口与第一系统端口连通,当在第一和第二位置时,阀构件阻挡高压端口和低压端口之间的连通; 所述阀构件经受作用以将所述阀构件牢固地安置在所述第一或第二位置的净压差力,以防止所述高压口和所述低压口之间的泄漏; 以及致动器,用于反转作用在阀构件上的净压差力的方向以使阀构件移开,并使其远离其第一或第二位置移动,以便于移动运动到另一位置。
    • 100. 发明授权
    • Temperature transducer assembly
    • 温度传感器组件
    • US5454641A
    • 1995-10-03
    • US180671
    • 1994-01-13
    • Thomas W. ParkerCharles D. Grant
    • Thomas W. ParkerCharles D. Grant
    • G01K1/14G01K1/16G01K1/20G01K13/00
    • G01K1/16G01K1/143G01K1/20Y10S236/06
    • A temperature sensing assembly for a heat exchanger flow tube comprises a housing having a thin heat transmitting wall section in heat conducting engagement with a flow tube, and a relatively thick, heat insulating structural support wall section; a thermally responsive signal producing assembly comprising an electrical signal producing element in heat transfer relationship with the heat transmitting wall section; an anchoring arrangement for positioning the signal producing element in heat exchange relationship with the heat transmitting wall section; a heat transfer element between the housing and heat exchanger flow tube tending to maintain the flow tube and heat insulating wall section temperatures the same; and an insulating jacket surrounding part of the heat transfer element.
    • 一种用于热交换器流管的温度检测组件包括具有与流动管导热接合的薄的传热壁部分和相对较厚的隔热结构支撑壁部分的壳体; 热响应信号产生组件,其包括与传热壁部分传热关系的电信号产生元件; 用于定位信号产生元件与传热壁部分处于热交换关系的锚定装置; 在壳体和换热器流管之间的传热元件倾向于保持流管和隔热壁部分的温度相同; 以及围绕传热元件的一部分的绝缘护套。