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| Number | Title | Issue Date |
| 7402425 | Stress-based electrostatic monitoring of chemical reactions and binding Electrostatic capacitance measurements are used to detect chemical or biological analytes, or chemical interactions, with great sensitivity. A diaphragm is coated with a material capable of selectively interacting with an analyte of interest, and interaction of the ... | 07/22/2008 |
| 7119654 | Temperature sensor A temperature sensor for radiant heating units with a heating coil disposed in a cup includes a tube with a first end connected to a housing of a switch with a movable contact cooperating with stationery contacts in the housing. A two-section rod, which extends into... | 10/10/2006 |
| 5834631 | Leakage measurement method and apparatus using the same According to the present invention, a leakage measurement apparatus includes a volume metering device having a diaphragm which is displaced in accordance with a change in volume of the measurement medium leaked from an object and transmitted to the diaphr... | 11/10/1998 |
| 5497663 | Flow rate logging seepage meter An apparatus for remotely measuring and logging the flow rate of groundwater seepage into surface water bodies. As groundwater seeps into a cavity created by a bottomless housing, it displaces water through an inlet and into a waterproof sealed upper comp... | 03/12/1996 |
| 5419191 | Apparatus for counting cycles of fluid flow A counting apparatus which is designed to be placed in parallel to a fluid flow line has a differential pressure switch which is placed across an orifice positioned within the fluid flow line. A counting mechanism is associated with the differential press... | 05/30/1995 |
| 5390542 | Membrane for a fluid flow meter A fluid flow meter has a housing with a fluid inlet and a fluid outlet and defining therebetween a fluid flow path. The flow meter has a flexible membrane having a inlet end mounted at an inlet region of the fluid flow path and a outlet end mounted at an ... | 02/21/1995 |
| 5347862 | Fluid flow meter The fluid flow meter includes a flexible membrane clamped between upstream and downstream centering springs to enhance membrane behavior and extend the fluid flow measurement range by automatically adaptively moving the apparent clamping points in respons... | 09/20/1994 |
| 5115682 | Coronary artery graft flow-meter A coronary artery graft flow-meter apparatus for insertion into a delivery line for solution to be perfused through a graft after the graft is anastomosed to a coronary artery is disclosed. The apparatus comprises a flow-meter chamber having an upper end ... | 05/26/1992 |
| 5069067 | Fluid flow meter The fluid flow meter includes a flexible membrane formed of a flexible material and containing an apparatus for providing the membrane with resilience for undulation. The membrane is mounted in the fluid flow path such that the pair of faces simultaneousl... | 12/03/1991 |
| 4920794 | Fluid flow meter A fluid flow meter comprising a housing having a pair of fluid ports and defining therebetween a fluid flow path; a flexible membrane defining a pair of opposing faces and being mounted in the fluid flow path such that the pair of faces simultaneously def... | 05/01/1990 |
| 4891979 | Gas meter having a synthetic diaphragm and molded housing A gas meter includes a housing made of thermoplastic material having an inside wall defining two measuring chambers and a deformable membrane disposed between the two measuring chambers. The deformable membrane is formed from a film of thermoplastic elast... | 01/09/1990 |
| 4779459 | Gas meter including a synthetic membrane A gas meter includes a housing made of thermoplastic material having an inside wall defining two measuring chambers and a deformable membrane disposed between the two measuring chambers. The deformable membrane is formed from a film of thermoplastic elast... | 10/25/1988 |
| 4602249 | Method and apparatus for detecting leaking valves in a volumetric infusion device A method and apparatus for detecting leaking valves in a volumetric fluid delivery system. The system employs a volumetric chamber divided into two compartments by a moveable membrane, with each compartment having a valved inlet and a valved outlet. In th... | 07/22/1986 |
| 4594890 | Fluid flow measuring device There is disclosed a fluid meter incorporating a bi-stable resilient member positioned in a housing. Fluid flow into and out of the housing causes the bi-stable member to oscillate in a single oscillatory mode. Since each oscillation of the member is prop... | 06/17/1986 |
| 4431425 | Flow fault sensing system A system for sensing flow faults in a membrane system for intravenous fluid introduction is provided. A scanner is pulsed to generate reflected energy signals representative of the position of a membrane within a chamber. The scanner is pulsed both before... | 02/14/1984 |
| 4409830 | Wave velocity detecting schemes for traveling wave flow meter In a flow meter of the traveling wave type having a flexible undulating membrane, velocity detecting means is utilized to determine the velocity of propagation of the traveling wave associated with the undulating flexible membrane between at least two kno... | 10/18/1983 |
| 4358954 | Traveling wave flow meter A traveling wave flow meter having a generally wave shaped member which is fabricated from a flexible material and which is disposed within a channel for conducting fluid. The flexible member undulates in response to a flow of fluid through the channel, a... | 11/16/1982 |
| 4337639 | Gas volume flow rate measurement apparatus Apparatus for measuring gas volume delivered at rapidly varying flow rates, over wide ranges of frequency of variation in flow rates, having a chamber with an outlet, means for varying the chamber volume to cause a volume of gas to be delivered from the o... | 07/06/1982 |
| 4315523 | Electronically controlled flow meter and flow control system A novel, low-friction, low-inertia flexible diaphragm containing a magnet formed as an integral part of the diaphragm is mounted in a chamber (preferably cylindrical). The chamber comprises part of the flow meter in a flow control system. One or more sens... | 02/16/1982 |
| 4283945 | Volume measuring apparatus A volumeter, in particular for use in liquid chromatography comprises a metering chamber for the volume to be measured. Another chamber is separated from the metering chamber by a resilient diaphragm and forms an electric capacitor. The capacitance of thi... | 08/18/1981 |
| 4007628 | Remote flow transducer for communication cable A method and apparatus for remotely monitoring air leakage in communication cables. Improved volume flow meters are remotely attached at the air inlet to manhole mounted manifolds for supply of dehumidified air to telephone cables. Dehumidified air passes... | 02/15/1977 |
