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| Number | Title | Issue Date |
| 8161791 | Prover self testing and validation apparatus A prover includes a piston supporting rod extending longitudinally through a cylinder, which cylinder receives and discharges a fluid to measure the volume and flow rate of the fluid by translation of the piston from the fluid receiving end to the fluid discharging ... | 04/24/2012 |
| 7650775 | Unidirectional captive displacement prover A prover includes a piston supporting rod extending longitudinally through a cylinder, which cylinder receives and discharges a fluid to measure the flow rate of the fluid by translation of the piston from the fluid receiving end to the fluid discharging end. Motive... | 01/26/2010 |
| 7395690 | Flowmeter/prover system and method A pulse production interval measurement module (or temporal reconciliation module) for preferred use with a computational flowmeter and/or non-computational flowmeters to thereby temporally reconcile or time shift flowmeter output produced by a volume of fluid flow ... | 07/08/2008 |
| 7386408 | Parallel kinematic machine, calibration method of parallel kinematic machine, and calibration program product A parallel kinematic machine has a parallel kinematic mechanism including an end effecter and a parallel link mechanism. A numerical control device controls a position and orientation of the end effecter based on kinematics of the parallel kinematic mechanism. A pos... | 06/10/2008 |
| 7290433 | Method and device for checking a sensor In an industrial installation equipped with a sensor, a method is provided for checking the sensor and providing a measurement sequence associated with the sensor. Monitoring occurs for a thermodynamic parameter of a monitored fluid circulating in the industrial ins... | 11/06/2007 |
| 7155956 | Medium, method and system for proving a turbine meter A novel medium, method and system for proving a turbine meter for use with natural gas. The novel test medium is a gas having the following characteristics: (a) Density>2×Density of Natural Gas; (b) Dynamic Viscosity | 01/02/2007 |
| 7114367 | Pulmonary function test calibration system and method A system for calibrating pulmonary function test equipment having syringe means, including a syringe having a cylindrically shaped sidewall, a proximal end with an centrally located orifice, a distal end with an output port, an interior cavity, and a plunger with a ... | 10/03/2006 |
| 7096565 | Flanged inner conductor coaxial resonators A method and apparatus for making an inner conductor from a conductive body integrally forms a flange on one end of the conductive body. The flange is formed integral to the conductive body by flaring the end of the conductive body. The size and shape of the flange ... | 08/29/2006 |
| 7089789 | System for calibrating an integrated injection nozzle and injection pump A fuel injection system (18) is calibrated as an assembled system. The fuel injection system (18) includes a unit pump (10) a cam follower (24), a joined fuel injection line (14) and injection nozzle (16). The fuel injection... | 08/15/2006 |
| 7060036 | Respiratory oxygen consumption measuring device and method A portable apparatus for calculating respiratory oxygen consumption comprising a housing having a fluid inlet, a flow sensor, mounted within the housing, an oxygen sensor and means for calculating the respiratory oxygen consumption using data obtained from the oxyge... | 06/13/2006 |
| 6938455 | Grease supply confirming device and method A grease supply confirming device confirming the supply of a grease into a bearing, according to the present invention includes a detecting member an elastic supporting member and a movable body. The movable body such as a metal spherical body is movably provided in... | 09/06/2005 |
| 6629447 | Machine and process for the calibration and proving of flow sensors A magnetically coupled, small volume, positive displacement, multi-axial, isokinetic, flow sensor calibrator or prover has one or more, serially interconnected flow tubes, through which a cylindrical, convoluted, displacer, with embedded, omni-directional... | 10/07/2003 |
| 6427517 | Low friction piston for gas flow calibration systems A calibration system for a tube prover used in gas flow rate calibration equipment includes a low friction piston which provides an effective seal without the use of mercury. The low friction piston is easily movable in a prover tube of the calibration sy... | 08/06/2002 |
| 6408674 | Pressure activated calibration system for chemical sensors A device for remotely calibrating leak sensors is disclosed. The leak sensor calibration device includes a reservoir for storing a fluid calibrant, a conduit in flow communication with the reservoir, an outlet nozzle, an air supply source, and a valve mec... | 06/25/2002 |
| 6359682 | Fluid flow velocity measuring system for internal combustion engine A fluid flow velocity measuring system for an internal combustion engine including a laser Doppler velocimeter having a probe for projecting a pair of coherent laser beams and beam guiding means for guiding the laser beams into a combustion chamber. The b... | 03/19/2002 |
| 5827941 | Flow-controlled calibration syringe A calibration syringe is constructed like a single stage manual pump having a plunger. The input manifold has a duckbill valve that functions to maintain a fixed air flow rate through the syringe even with variable forces acting on the plunger. The duckbi... | 10/27/1998 |
| 5456101 | Apparatus for calibrating a mass air flow sensor using an oscillating air flow A method and apparatus for calibrating a mass air flow sensor in which the sensing elements of the sensor are subjected to an oscillating mass air flow summed with an offset mass air flow to produce the summed mass air flow. The output waveform of the mas... | 10/10/1995 |
| 5456107 | Modular gas flowmeter A high accuracy flowmeter for testing and calibrating flowmeters and the like, and more particularly a positive displacement flowmeter which may include a cylinder (12), a piston (10) within the cylinder (12) which makes a clearance seal with the inside o... | 10/10/1995 |
| 5440925 | Flow calibrator The invention relates to a high accuracy flowmeter for testing and calibrating flowmeters and the like, and more particularly to a positive displacement flowmeter which may include a cylinder (12), a piston (10) within the cylinder (12) which makes a clea... | 08/15/1995 |
| 5390528 | Method and apparatus for calibrating a mass air flow sensor using an oscillating air flow A method and apparatus for calibrating a mass air flow sensor in which the sensing elements of the sensor are subjected to an oscillating mass air flow summed with an offset mass air flow to produce the summed mass air flow. The output waveform of the mas... | 02/21/1995 |
| 5317895 | Flowmeter proving apparatus A flowmeter proving apparatus for obtaining a reliable flow meter factor in a short time, using a flow-meter having a non-uniform pulse output with a small volume power. The flowmeter to be proved is connected in series with a small volume prover, using a... | 06/07/1994 |
| 5226311 | Fluid flow generating apparatus Apparatus for generating a precision fluid flow comprises a cylinder having side and end walls forming a fluid-receiving chamber having a fluid inlet and a fluid outlet. A cylindrical piston free of engagement with the cylinder side wall is movable longit... | 07/13/1993 |
| 5191782 | Device for gauging a volumetric meter A method of and device for gauging a liquid meter, the device comprising an enclosure containing a piston and hydraulically connectable to the measuring member of the meter, the piston being a plunger piston with a cross-section smaller than that of the e... | 03/09/1993 |
| 5140862 | Injection pump calibration device An injection pump calibration device insertable in place of an actual syringe in an infusion syringe pump is described. The housing is shaped like a syringe body and configured to detachably mount in place of an actual syringe in an infusion syringe pump.... | 08/25/1992 |
| 5111682 | Apparatus and method for determining the flow characteristics of a volumetric flowmeter A mechanical displacement flowmeter calibrator has a first fluid line external of the measuring cylinder of the calibrator connected between the inlet and outlet thereof. A flowmeter that produces flow-representative passes is connected in the fluid line.... | 05/12/1992 |
| 5072416 | Method and apparatus for calibrating a flowmeter using a master meter and a prover A double cycle prover is used to calibrate meters which require long proving runs. A small volume or piston prover and a master flowmeter, are coupled in series with the meter under test, then the master flowmeter is calibrated against the small volume pr... | 12/10/1991 |
| 4996869 | System for selecting valid K-factor data points based upon selected criteria A moveable fluid barrier (16) is driven from an upstream position to a downstream position through a measuring cylinder (18) connected fluidically in series with the flowmeter (22) under test to induce fluid flow therethrough at a flow rate related to the... | 03/05/1991 |
| 4881186 | Apparatus for measuring injection speed of die cast machines In apparatus for measuring injection speed of a die cast machine, there are provided a pulse generator responsive to a movement of an injection plunger for producing a pulse signal, a detector for detecting a width of the pulse signal to produce pulse wid... | 11/14/1989 |
| 4811252 | Leakage test equipment Leak test equipment which includes a master side pneumatic system and a work side pneumatic system executes a leakage test sequence basically including pressurizing, balancing and detecting steps under control of a microcomputer. A nonvolatile read/write ... | 03/07/1989 |
| 4649734 | Apparatus and method for calibrating a flow meter An apparatus and method for calibrating a flow meter are provided which utilize a tank for maintaining the apparatus liquid full. The tank has a freely movable barrier therein which divides the interior of the tank into a first section and a second sectio... | 03/17/1987 |
| 4619134 | Testing device for flow meters Disclosed is a testing device for at least one flow meter installed in a pipeline. The device includes a calibration container connected to the pipeline across a switch-over valve. A measuring piston is guided for reciprocating movement in the container b... | 10/28/1986 |
| 4537058 | Volume calibration syringe A calibration syringe for controllably delivering gas to a respiratory gas measuring instrument during the calibration thereof. In addition to the piston and cylinder arrangement used in prior syringes, the calibration syringe of the invention includes se... | 08/27/1985 |
| 4507952 | Apparatus for testing flow meters A proving system is described wherein there is a cylinder and a moving piston within the cylinder having an indicator rod extending out of the cylinder and a cursor on the rod adapted to move relative to a scale. A jacket surrounds the cylinder to which l... | 04/02/1985 |
| 4479377 | Method and apparatus for measuring gas flow A movable piston is arranged within an open-ended cylinder, the piston having a peripheral groove for receiving liquid mercury to create a sliding gas-tight seal between the piston and the cylinder. The cylinder wall is provided with a plurality of openin... | 10/30/1984 |
| 4448058 | Respiratory gas analysis instrument having improved volume calibration method and apparatus An improved gas volume calibration method and apparatus for use in respiratory gas analyzers. A control unit monitors the flow of calibration gas through the analyzer by monitoring the electrical signals produced by a gas turbine and a breath switch. Duri... | 05/15/1984 |
| 4253156 | Automatic flowmeter calibration system A system for automatically calibrating the accuracy of a flowmeter which is used for measuring the flow of fluid such as gas or liquid flowing therethrough. The system includes a calculator capable of performing mathematical functions responsive to receiv... | 02/24/1981 |
