| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073232000 | Expansible chamber | 27 |
| 20090078042 | FLUID FLOW SENSOR - An improved fluid flow sensor comprising a housing with a fluid inlet and fluid outlet, a valve chamber connected to the fluid inlet, and a movable valve body wherein the valve body moves between a first position, blocking a first outlet in the valve chamber, and a second position blocking a second outlet in the valve chamber; the first outlet of the valve chamber connected to an inlet at the first end of a measuring chamber, and the second outlet of the valve chamber connected to an inlet at the second end of the measuring chamber, with a movable measuring body located in the measuring chamber capable of moving between the first and second ends of the measuring chamber, and the measuring chamber having outlets at the first and second ends, so that the movable bodies switch position in tandem as fluid flows through the system. | 03-26-2009 |
| 073234000 | Wet type (e.g., liquid seal) | 2 |
| 20160377469 | Method and Apparatus for Measuring Gas Flow - There are described a method and an apparatus for measuring gas flow rate and/or volume (such as gas accumulation and consumption) based on the “rate of rise” method, particularly useful in the field of small gas flow rates, that uses a duct immersed in a liquid so as to generate a hydrostatic pressure that allows increase in pressure in a sealed chamber, so as to avoid the use of solenoid valves, producing a particular advantage when a multiple measurement system is required, when a plurality of gas flows are to be measured. The method can be applied advantageously to measure flow rates of gas produced by chemical and/or biological reactions, in particular the Biochemical Methane Potential (BMP) or the Biochemical Hydrogen Potential (BHP). A variant of the method also allows measurement of the Biochemical Oxygen Demand (BOD). | 12-29-2016 |
| 073238000 | Nutating bell | 1 |
| 20110219870 | Unitary Drive System for Water Meter - A metering apparatus for measuring the flow of water or other fluid through a conduit. The meter comprises a measuring chamber, in which is disposed a nutating ball and disc. A unitary biaxial member, comprising a drive shaft and a spindle having a longitudinal axis offset from that of the drive shaft, couples the ball and disc to a rotating magnet. The unitary biaxial member both controls the offset of the ball and disc from horizontal, such that it nutates in response to water flow through the meter, and translates this nutation to rotation of the magnet, allowing for measurement of water volume flowing through the measuring chamber. | 09-15-2011 |
| 073239000 | Reciprocating piston or cylinder | 4 |
| 20110100115 | FLUID METER WITH PRESSURE PROTECTION - A fluid meter is described having certain elastically displaceable wall portions arranged to be elastically displaced in response to a pressure variation propagating into the measurement volume. | 05-05-2011 |
| 20110100116 | FLUID METER - A fluid meter is described having multiple pistons and connecting rods that are connected to the crankshaft by one common crankpin that is radially offset from the crankshaft such that an axis through the endpoints of the yoke slot of one connecting rod forms an angle alpha with the alignment axis of the two axially aligned cylinders, and that an axis through the endpoints of the yoke slot of the other connecting rod forms another, different angle beta with said alignment axis, so that the corresponding pistons reciprocate out of phase. | 05-05-2011 |
| 20130333464 | CONTINUOUS PISTON FLOW METER - According to the present invention a flow meter is provided for measuring a fluid, comprising a measuring tube with a measuring piston movably arranged in said measuring tube, and elements for changing the direction of movement of the measuring piston in said measuring tube, wherein said measuring piston, when measuring, is designed to be moved in said measuring tube under the influence of said fluid. Sensor elements detect movement of the piston and the direction of movement in said measuring tube, and sensor elements detect when the piston is situated in at least one of its reversing areas before the measuring piston has reached the extreme point of the reversing area, so as to afford a substantially continuous flow detection for said fluid. | 12-19-2013 |
| 073247000 | Radial cylinder | 1 |
| 20110100117 | FLUID METER - A multiple piston type fluid meter is disclosed having a first connecting rod and a second connecting rod that are integral with their respective pistons. A multiple fluid meter assembly comprising at least two fluid meters, and a fuel dispensing unit comprising a fluid meter or multiple fluid meters are also disclosed. | 05-05-2011 |
| 073253000 | Rotary piston or cylinder | 18 |
| 20100071458 | POSITIVE DISPLACEMENT FLOW MEASUREMENT DEVICE - A positive displacement flow measurement device includes a rotor portion positioned inside a casing portion to act as a least area rotor that captures a volume of material and moves the volume of material along the length of the device. The device is coupled to a means for counting the number of revolutions of the rotor portion and/or the casing portion over a predetermined period of time. In one embodiment, the counting means comprises a shaft encoder that measures the angular position of a shaft of the rotor portion and sends a signal to a processor of a computing device that determines the volume of material flowing through the device. | 03-25-2010 |
| 20100300199 | POSITIVE DISPLACEMENT FLUID FLOW METER - A positive displacement fluid flow meter comprises a chamber having a fluid inlet and a fluid outlet. A rotor is displaceable within the chamber, rotation of the rotor being related to the volume of fluid passing through the chamber. The chamber has a surface proximate which an end surface of the rotor passes, the chamber surface and/or the rotor end surface having at least one recess to retain at least a portion of debris carried by the metered fluid. The recess is preferably formed so as not to provide fluid, communication, from the inlet to the outlet across the rotor end surface. A lid closes an end of the chamber which in use is subject to the pressure of fluid within the chamber. The lid is engaged at its periphery to a wall of the chamber, and is preferably flexible adjacent its periphery to reduce the transmission of bending stresses between the periphery of the lid and the remainder thereof. | 12-02-2010 |
| 20110167903 | ROTARY POSITIVE DISPLACEMENT FLOWMETER - A rotary positive displacement flowmeter of the type utilizing two displacement rotors and a blocking rotor with the blocking rotor having a single recess and the displacement rotor cylinders being of substantially similar size as the blocking rotor, resulting in a uniform flowpath through the flowmeter with alignment of the rotor axes in a 180 degree plane. | 07-14-2011 |
| 20130319106 | Flow Meter with Hollow Blocking Rotor - A flow meter is disclosed with a hollow blocking rotor. The flow meter includes a housing that has a cavity with an inlet and an outlet. The flow meter also includes a pair of displacement rotors with a blocking rotor disposed between the displacement rotors. The blocking rotor includes a pair of convex walls and a pair of concave walls. The blocking rotor further includes a shaft coupled to the pair of concave walls. Each concave wall is disposed between and coupled to a pair of opposing convex walls. The concave walls provide clearance for rotation of the displacement rotors when the displacement rotors sweep along the concave walls. The hollow configuration of the blocking rotor reduces the impedance of the flow meter. | 12-05-2013 |
| 20160069721 | PORTING CONFIGURATION FOR A FLUID FLOW METER - A flow meter configuration with improved inlet and outlet porting for improving the Turndown Ratio including a chamber having opposed arcuate chamber walls and a central axis extending therethrough, at least one gear for rotation within the chamber wherein the at least one gear is positioned to seal against a chamber wall during rotation, an inlet in fluid communication with the chamber, the inlet including an inlet wall, an outlet in fluid communication with said chamber, the outlet including an outlet wall, and wherein at least one of the inlet wall and outlet wall is angled relative to the central axis so as to form a porting angle less than 90°. In some embodiments, the opposed arcuate chamber walls may lie on an arc of less than 180°. | 03-10-2016 |
| 20190145809 | COOLABLE DEVICE FOR MEASURING THROUGH-FLOW PROCESSES OF FLUIDS | 05-16-2019 |
| 20190145810 | DEVICE COMPRISING A CANNED MOTOR FOR MEASURING FLOW PROCESSES OF MEASURING FLUIDS | 05-16-2019 |
| 073254000 | With compensating bypass | 1 |
| 20100154533 | ARRANGEMENT WITH AT LEAST ONE FLOW-THROUGH MEASURING DEVICE FOR FLUIDS - An arrangement having at least one flow meter ( | 06-24-2010 |
| 073255000 | With orbital movement | 2 |
| 20100257929 | ORBITAL BALL FLOWMETER FOR GAS AND FLUID - A flow meter has a housing having an inlet, an outlet, and a measuring chamber between the inlet and outlet. The measuring chamber has a diameter larger than that of the inlet. A blade section is located between the inlet and the measuring chamber, and the blade section comprises a cylindrical part near the measuring chamber and having a cylindrical inner wall, an expanding part between the cylindrical part and the inlet, and spiral blades which extend from the expanding part to the housing, for imparting the rotational movement to the fluid when the fluid enters the measuring chamber. A ball is positioned in the measuring chamber such that the rotational movement of the fluid moves the ball in a circular motion around the measuring chamber for measuring the flow of the fluid. | 10-14-2010 |
| 20130199291 | ORBITAL BALL FLOWMETER FOR GAS AND FLUID - A flow meter has a housing having an inlet, an outlet, and a measuring chamber between the inlet and outlet. The measuring chamber has a diameter larger than that of the inlet. A blade section is located between the inlet and the measuring chamber, and the blade section comprises a cylindrical part near the measuring chamber and having a cylindrical inner wall, an expanding part between the cylindrical part and the inlet, and spiral blades which extend from the expanding part to the housing, for imparting the rotational movement to the fluid when the fluid enters the measuring chamber. A ball is positioned in the measuring chamber such that the rotational movement of the fluid moves the ball in a circular motion around the measuring chamber for measuring the flow of the fluid. | 08-08-2013 |
| 073261000 | With interengaging pistons | 8 |
| 20090126478 | Oval Gear Meter - The invention relates to an oval gear meter for flow measurement, the meter comprising: two oval-shaped gears ( | 05-21-2009 |
| 20100199758 | FLOW METER - Embodiments of the invention provide devices and methods for measuring fluid volume. Devices according to some embodiments include a chamber, having a pair of gears rotatably mounted therewithin. Fluid flow through the chamber causes rotation of the gears, such that each rotation and/or partial rotation results in a known volume of the fluid passing through the chamber. An optical sensor positioned outside of the chamber, can view the rotating gears through a substantially transparent chamber wall. The optical sensor can view an optical characteristic of one or both of the gears, and based upon this data, fluid volume, flow rate, and/or flow direction can be determined. Devices and methods disclosed herein can provide for improved precision in fluid flow meter measurement. In addition, the devices and methods used herein can be more durable and easier to fabricate than previously known positive displacement flow meters. | 08-12-2010 |
| 20100281970 | POSITIVE DISPLACEMENT FLOWMETER - A position displacement flowmeter having a pair of non-circular gears in a rolling contact on a pitch line without slippage. The positive displacement flowmeter comprises a casing and a pair of rotors provided in the casing and rotatable around its center axes. The pair of rotors have a tooth profile curve which is an oval pitch curve itself having a trajectory of contact points on the pitch line, and they satisfy a condition of r | 11-11-2010 |
| 20100307234 | POSITIVE DISPLACEMENT FLOWMETER AND HELICAL GEAR - An ideal positive displacement flowmeter which has a pair of helical gears given by using oval pitch curve as reference rack tooth profile, with the tooth height ratio of the reference rack tooth profile even with a small number of teeth being set to π m/4 which is a logical limit for the tooth height ratio of a one-point continuous contact tooth profile and which has no confinement phenomenon between tooth profiles. The positive displacement flowmeter has a pair of helical gears ( | 12-09-2010 |
| 20130025365 | Positive displacement flow meter - There is a positive displacement flowmeter having a pair of rotors | 01-31-2013 |
| 20150135825 | GEAR FLOWMETER - The invention relates to a gear flow meter for measuring the flow of a fluid, having a gear chamber, in which at least one measuring gear wheel is arranged, having a bottom and a cover which delimit the gear chamber on end faces of the at least one measuring gear wheel, wherein a respective rotation shaft is provided centrally relative to each measuring gear wheel, wherein each measuring gear wheel is rotatably mounted and a fluid is conveyable through the gear chamber to rotate the at least one measuring gear wheel, having a measuring unit to detect a gear rotation and having evaluation means to determine a flow of the fluid through the gear chamber on the basis of the gear rotation. The gear flow meter is characterised according to the invention in that a respective receiving area is provided between each measuring gear wheel and the bottom and also between each measuring gear wheel and the cover, in which receiving area rolling elements are arranged for mounting the respective measuring gear wheel, the rolling elements directly contact the respective measuring gear wheel, the respective rotation shaft and the bottom or cover, and the rolling elements can each be moved as a whole relative to the rotation shaft, the measuring gear wheel and the bottom or cover which they contact. | 05-21-2015 |
| 20160018247 | OVAL GEAR METER - Embodiments include a flow measuring system for measuring characteristics of a fluid flow. The flow measuring system can include a pair of rotating members rotating synchronously to the fluid flow. At least one rotating member can include a normally-reflecting portion and a non-normally reflecting portion. The normally-reflecting portion reflects an incident beam in a direction parallel to the normal direction of the plane of the normally-reflecting portion. The non-normally reflecting portion reflects the incident beam in a direction non-parallel to the normal direction of the plane of the normally-reflecting portion. The flow measuring system measures the optical characteristics of a beam reflected by the normally-reflecting portion and determines rotational characteristics of the rotating member. The flow measuring system determines characteristics of the flow based on the rotational characteristics of the rotating member. | 01-21-2016 |
| 20160178423 | Flow Meters with Improved Blocking and Displacement Rotors | 06-23-2016 |
| 073262000 | Diaphragm or collapsible wall | 2 |
| 073269000 | Single diaphragm | 2 |
| 20100077852 | GAS METERING DIAPHRAGM - A diaphragm for use in a gas meter that includes an expansion section having a series of convolutions. During repeated use of the diaphragm, the expansion section flexes to allow the center section of the diaphragm and the attached diaphragm disk to move between a retracted position and extended position. The convolutions formed in the expansion section include a series of curved peaks and curved troughs joined by web sections. The multiple convolutions in the expansion section allows for more consistent and repeatable movement and volume displacement of the diaphragm between the extended and retracted positions. The action of the convolutions also contributes to extended life by eliminating wrinkling of the diaphragm material. | 04-01-2010 |
| 073271000 | With fluid actuated valve | 1 |
| 20100313652 | Microfluidic Measuring Tool to Measure Through-Silicon Via Depth - A tool to measure the depth of one or more through-silicon vias, the tool fabricated in silicon to include a microfluidic chamber that is positioned over the one or more through-silicon vias, further including a fluid actuation chamber to inject fluid into the microfluidic chamber and into the one or more through-silicon vias, and a pressure sensing chamber to sense the fluid pressure to indicate when the one or more through-silicon vias are filled with the fluid. | 12-16-2010 |
