公开(公告)号：US06203291B1

公开(公告)日：2001-03-20

申请号：US08834538

申请日：1997-04-04

申请人： Erik Stemme ,  Goran Stemme

发明人： Erik Stemme ,  Goran Stemme

IPC分类号： F04B1700

CPC分类号： F04B53/1077 ,  F04B43/043 ,  Y10T137/2224

摘要： A displacement pump with a pump housing containing a pump chamber of varying volume, the limiting walls of which includes a moveable portion or diaphragm, the movement and/or deformation of which varies the pump chamber volume. The pump chamber has a fluid inlet on the suction side of the pump and a fluid outlet on the pressure side. Both the fluid inlet and the fluid outlet, or possibly only one of them, includes a flow controlling element having one diffuser and one diffuser inlet which, for the same flow, has a larger pressure drop in one flow direction (the nozzle direction) than in the opposite flow direction (the diffuser direction). A drive element is coupled to the diaphragm, whereby the diaphragm can be caused to oscillate, so that the fluid volume in the pump chamber is caused to pulsate and thereby produce a net flow of fluid through the pump.

摘要翻译： 一种具有泵壳体的容积泵，其包含不同体积的泵室，其限制壁包括可移动部分或隔膜，其移动和/或变形改变泵室容积。 泵室在泵的吸入侧具有流体入口，在压力侧具有流体出口。 流体入口和流体出口（或者可能只有其中一个）包括具有一个扩散器和一个扩散器入口的流量控制元件，其对于相同的流在一个流动方向（喷嘴方向）上具有较大的压降， 在相反的流动方向（扩散器方向）上。 驱动元件连接到隔膜上，由此可使隔膜振动，从而使得泵室中的流体体积发生脉动，从而产生通过泵的净流量。

公开(公告)号：US6055869A

公开(公告)日：2000-05-02

申请号：US873414

申请日：1997-06-12

申请人： Erik Stemme ,  Goran Stemme ,  Edvard Kalvesten ,  Niklas Svedin

发明人： Erik Stemme ,  Goran Stemme ,  Edvard Kalvesten ,  Niklas Svedin

IPC分类号： G01F1/20 ,  G01P5/02 ,  G01F1/28 ,  G01F13/00

CPC分类号： G01P5/02

摘要： A fluid flow sensor uses lift forces exerted on a plate-like airfoil member to determine the velocity of a fluid flowing past the sensor. The member has a pair of spaced, low aspect ratio airfoil elements. A central portion of the airfoil member is coupled to a frame that positions the airfoil member in the fluid flow with an angle of attack with respect to the fluid flow direction. The flowing fluid generates velocity related lift forces on the airfoil member, the magnitude of which decrease along the airfoil member from the upstream end to the downstream end. The lift forces so applied deflect the upstream airfoil element to a greater extent than the downstream airfoil element. Strain gauges are coupled to the airfoil elements to detect their deflection. The strain gauges are connected in a bridge configuration to provide a signal indicative of fluid velocity.

摘要翻译： 流体流量传感器使用施加在板状翼型件上的提升力来确定流过传感器的流体的速度。 该构件具有一对间隔的低纵横比的翼型元件。 翼型构件的中心部分联接到框架，其将翼型构件定位在流体流中，相对于流体流动方向具有迎角。 流动的流体在翼型件上产生速度相关升力，其大小从翼型件从上游端到下游端减小。 如此施加的提升力使上游翼型元件比下游翼型元件更大程度地偏转。 应变计耦合到翼型元件以检测它们的偏转。 应变计以桥式结构连接以提供指示流体速度的信号。