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| Number | Title | Issue Date |
| 7549348 | Flow characteristic indicating flow meter A flow meter having a scale with temperature set points corresponding to a flow rate that a known fluid flowing therethrough at the set point temperature must reach to ensure turbulent flow of the fluid through a cooling system of a specified diameter. The flow mete... | 06/23/2009 |
| 7469601 | Flow meter using digital signals A flow meter using digital signals constructed in a small size and outputting an electric signal of a position of a float in a tapered tube with high accuracy is provided. A first reflecting means 6 has a ray 20 entered from the entering means | 12/30/2008 |
| 7363811 | Measurement pickup A measurement pickup is provided offering a high measure of safety and having a measurement pickup housing, a sensor element arranged in the measurement pickup, at least one connection element closing the measurement pickup housing, and an excess-pressure protection... | 04/29/2008 |
| 7360454 | Flowmeter having a float and a displacement sensor A flowmeter can measure a small flow rate of fluid with high measurement precision, can be made small-sized, can deal with a variety of types of chemicals, and can be produced easily at a low cost. The flowmeter includes: a casing having an enlarged portion and bein... | 04/22/2008 |
| 7298280 | Lighted fluid flow indication apparatus A fluid flow indication apparatus is provided for monitoring and giving an indication of fluid flow. ... | 11/20/2007 |
| 7219559 | Flow meter using digital signals A flow meter outputs an electric signal of a position a float within a taper-shaped tube precisely. A taper-shaped tube is made of an approximately transparent material, is mounted approximately vertically, and circulates a fluid such as water or the like, and a flo... | 05/22/2007 |
| 7188035 | Coriolis mass flow meter for measuring a concentration In a Coriolis mass flow meter for determining the concentration of a flowing fluid, a concentration function is stored in a concentration evaluating unit. This enables the user to produce a concentration value at given temperature and density of the medium appropria... | 03/06/2007 |
| 7152469 | Fluid flow sensor, method and system A fluid flow sensor, a method of detecting flow/no flow and flow systems employing same are provided. In one embodiment, an infrared light emitting diode (“LED”), phototransistor, rigid housing and a flexible opaque diaphragm are used. The diaphragm opens upon a... | 12/26/2006 |
| 7146280 | Startup and operational techniques for a digital flowmeter Startup and operational techniques for a digital flowmeter are described. The techniques select an optimal mode of operation for the digital flowmeter, depending on a current environment of the flowmeter. For example, during a startup operation of the flowmeter, the... | 12/05/2006 |
| 7140262 | Precision variable area flowmeter apparatus We have invented an improved apparatus for electronically measuring fluid flow. The apparatus includes a radiation detection means for indicating the position of a flow indicator in a chamber of a variable area flowmeter and has a reliability, versatility and functi... | 11/28/2006 |
| 7136761 | Digital flowmeter A controller for a flowmeter includes an input module operable to receive a sensor signal from a sensor connected to a vibratable flowtube. The sensor signal is related to a fluid flow through the flowtube. The controller also includes a signal processing system ope... | 11/14/2006 |
| 6952962 | Mobile monolithic polymer elements for flow control in microfluidic devices A cast-in-place and lithographically shaped mobile, monolithic polymer element for fluid flow control in microfluidic devices and method of manufacture. Microfluid flow control devices, or microvalves that provide for control of fluid or ionic current flow can be ma... | 10/11/2005 |
| 6950760 | Startup and operational techniques for a digital flowmeter Startup and operational techniques for a digital flowmeter are described. The techniques select an optimal mode of operation for the digital flowmeter, depending on a current environment of the flowmeter. For example, during a startup operation of the flowmeter, the... | 09/27/2005 |
| 6943690 | Flow verification mechanism A flow verification sensor apparatus (30) is used with a constant volume pump (11) that pumps a liquid product (13) from a container (12). A plummet (32) is positioned in a flow tube (31). A sensor (33) is positioned ... | 09/13/2005 |
| 6935190 | Flow rate measurement apparatus An apparatus for flow rate measurement includes a body having a chamber with an inlet and an outlet and a structure, buoyant in the presence of a fluid, disposed in the chamber. The structure moves to a position in the chamber in proportion to a flow rate of the flu... | 08/30/2005 |
| 6917887 | Digital flowmeter A flowmeter includes a vibratable conduit, a driver connected to the conduit and operable to impart motion to the conduit, and a sensor connected to the conduit and operable to sense the motion of the conduit. A control and measurement system is connected to the dri... | 07/12/2005 |
| 6901813 | Flow meter alarm device A flow meter alarm device easily attached to and removed from a flow meter at various locations along the length of the flow meter. The device is compatible with flow meters which have a float for measuring flow velocity. The device preferably has two housings, exte... | 06/07/2005 |
| 6679291 | Poppet valve assembly A poppet valve assembly is provided for use on a fuel tanker truck which enables the truck's driver to determine whether fuel is flowing through the valve assembly and whether fuel is present in the valve assembly. When a threshold flow rate through the v... | 01/20/2004 |
| 6539814 | Flowmeter with threadless body and float stopper A flowmeter for measuring fluid flow including a body having a receptacle including a cavity formed by a threadless cylindrical side wall, a stopper adapted to be inserted into the cavity of the receptacle including a generally cylindrical threadless shan... | 04/01/2003 |
| 6434494 | Pressure based fluid gauging system A method for gauging liquid in a container, the method comprising: a) assigning a local three axis coordinate system for the container; b) dividing the container into a plurality of regular volumes; c) disposing a first pressure sensor at a predetermined ... | 08/13/2002 |
| 6338278 | Flow detector to monitor a number of flow events or duration A flow detector to detect and monitor the flow of fluid through a conduit comprising a first flow detection element selectively moveable between a first position and a second position and a second flow detection element disposed to operatively engage the ... | 01/15/2002 |
| 6338279 | Flow detector to monitor a number of flow events or duration A flow detector to detect and monitor the flow of fluid through a conduit comprising a first flow detection element selectively moveable between a first position and a second position and a second flow detection element disposed to operatively engage the ... | 01/15/2002 |
| 6321604 | Electro-optical float position indicator A device for converting a position of a float member in a rotameter in to an electrical output. Light from a light source is collimated into parallel light rays, at either or both opposing sides of a rotameter tube to greatly enhance accuracy of readings.... | 11/27/2001 |
| 6196070 | Flow sensor with wide dynamic range An improved fluid flow measuring device having more nearly linear response characteristics over a wide range of fluid flow rates measures the force exerted on a fluid flow sensing element (21, 37, 41, 47, 55, 61) located in the fluid flow. The effective a... | 03/06/2001 |
| 6079279 | Suspended-body flow meter A suspended-body flow meter for flowing media of the type having a measuring tube, a suspended body that can move in the flow direction and is arranged in the measuring tube, at least one permanent magnet connected to the suspended body, at least one rota... | 06/27/2000 |
| 5911219 | Therapeutic gas flow meter and monitor A flow meter has a body, an inlet operatively connected to a source of gas, and an outlet. A valve for opening and closing the outlet is provided which includes a valve seat, a valve shaft movable axially relative to the valve seat and a valve member on t... | 06/15/1999 |
| 5837904 | Flowmeter tubes and method of installing them A method of preventing the inserting of a wrong flowmeter tube into an anesthesia machine comprises the steps of forming a selected number of longitudinal ridges at selected places on the inside surface of an upper portion of a flowmeter tube, attempting ... | 11/17/1998 |
| 5821428 | Sealed observation element for sulfur recovery unit A sealed observation element for viewing the flow of molten liquid during the operation of a sulfur recovery unit comprises at least one sight glass that is heated and which may be swept with a purge gas supplied through one or more bleed rings to prevent... | 10/13/1998 |
| 5734112 | Method and apparatus for measuring pressure in a coriolis mass flowmeter A method for determining pressure in an operating Coriolis effect mass flowmeter. The Coriolis flowmeter flow tubes are vibrated in both a bending mode (as is normal for measuring mass flow rate) and in a twisting mode. The ratio of the fundamental freque... | 03/31/1998 |
| 5627325 | Capacitively coupled ohmic resistance position sensor A position sensor comprises a pair of electrically conducting elongated members having a high ohmic resistance per unit length thereof disposed parallel to one another in a direction defined by the line of displacement of a target member, and a capacitive... | 05/06/1997 |
| 5544533 | Area flow meter with hall devices having magnetism-responsive surfaces In an area flow meter, float 22 made of material larger in specific gravity than a fluid being measured is movably disposed in vertical pipe 21. Magnet 23 in the float 22 has its north and south poles aligned vertically to produce magnetic-force lines 26 ... | 08/13/1996 |
| 5499544 | Capacitively coupled ohmic resistance position sensor A position sensor comprises a pair of electrically conducting elongated members having a high ohmic resistance per unit length thereof disposed parallel to one another in a direction defined by the line of displacement of a target member, and a capacitive... | 03/19/1996 |
| 5379651 | Point optical beam electronic rotometer An improved electronic monitoring arrangement for a rotameter utilizes a single point source of radiation at one side of the rotameter and a vertical array of detectors diametrically opposite to it. The elevation of the radiation source is identical to th... | 01/10/1995 |
| 5347875 | Capacitor-coupled ohmic resistance position sensor A position sensor comprises a pair of elongated members of strip or tape shape having a high specific ohmic resistance, and a target member capacitively coupling two electric signals respectively flowing through the pair of elongated members, which target... | 09/20/1994 |
| 5327789 | Electromagnetic detection system for variable area flowmeter A variable area flowmeter employing a vertical tube containing a displaceable magnet and a closed-loop magnetic detection circuit. The closed-loop magnetic detection circuit includes first and second magnetic cores each having a sense coil and a compensat... | 07/12/1994 |
| 5187988 | Apparatus for measuring the flow of a fluid medium Apparatus for measuring the flow of a fluid medium which flows upward through a substantially vertically mounted tube section having a suspended body in the tube section. The vertical position of the suspended body depends on the intensity of the flow. Mo... | 02/23/1993 |
| 5186058 | Rotameter with float guides A rotameter comprises a tapered flow passage, a magnetized float disposed in the tapered flow passage, and a plurality of float guides with guiding edges disposed parallel to and about the central axis of the tapered flow passage limiting the movements of... | 02/16/1993 |
| 5142271 | Fluid flow sensor A fluid flow sensor for use with a fluid circulating system to indicate a predetermined rate of fluid flow therethrough, fluid flow sensor comprises a hollow fluid flow sensor body including a lower flow detection chamber and an upper fluid flow chamber f... | 08/25/1992 |
| 5099698 | Electronic readout for a rotameter flow gauge An electronic readout for a rotameter flow gauge which includes means for optically scanning a rotameter flow gauge and determining the position of a float within the rotameter.... | 03/31/1992 |
| 5079961 | Rotameter with remote read-out device A flowmeter comprises a vertically disposed tapered flow passage with cross sectional area increasing from the bottom inlet to the top outlet of the tapered flow passage, a flow obstructing member disposed within the tapered flow passage in a suspended ar... | 01/14/1992 |
