Class 73/1.25 - Orifice or restriction

Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein either (a) the proving or calibrating
No. of patents: 35
Last issue date: 11/06/2007

Number	Title	Issue Date
7292945	Fluid flow measuring and proportional fluid flow control device The present invention provides restrictive-flow flow measurement devices, valve improvements and signal control devices and processes that control the flow of liquids, including control processes for single-liquid calibration. ...	11/06/2007
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
7249486	Method for monitoring a sensor The present invention concerns a method of monitoring a sensor for sensing the flow speed of a medium. The invention further concerns an apparatus for carrying out that method. In order to be able to monitor the sensor, without providing redundant sensors, the flow ...	07/31/2007
7234491	Device for damping water hammer A device damps water hammers in hydraulic accumulators, in particular in piston accumulators. The device is embodied in the form of the accumulator component which operates as a throttle on a fluid flow and is inserted between internal elements (12) of the ac...	06/26/2007
7210500	Methods and apparatus for mechanically adjusting a null offset in a torque motor of a servovalve A servovalve assembly includes a motor having a flapper shaft. A flapper couples to a first end of the flapper shaft such that the flapper shaft orients the flapper between a first nozzle and a second nozzle of the servovalve assembly. An adjustment assembly adjusts...	05/01/2007
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
7055364	Exhaust volume measurement device A vehicle exhaust measurement system is provided includes that a conduit having a conduit inlet and a conduit outlet. A make-up air tube is connected to and is in fluid communication with the conduit inlet. The make-up air tube provides make-up air for mixing an exh...	06/06/2006
6973818	Exhaust volume measurement device A vehicle exhaust measurement system is provided includes that a conduit having a conduit inlet and a conduit outlet. A make-up air tube is connected to and is in fluid communication with the conduit inlet. The make-up air tube provides make-up air for mixing an exh...	12/13/2005
6886534	Method for limiting the maximum injection pressure of magnet-controlled, cam-driven injection components A method for limiting the maximum allowable operating pressure at a cam-driven injection component, which component is actuatable by a magnet valve assembly. After assembly a magnet valve it is operated at a pressure source in the context of a function test, and at ...	05/03/2005
6595040	Test leak unit A test leak unit (1) includes a supply of test gas, preferably helium, and an element (14) for determining leakage rates. The aim of the invention is to create a simple, robust and easily refilled test leak unit, especially for detecting packaging leaks. ...	07/22/2003
6470281	Method and apparatus for measuring a throttle point In a process and a device for measuring a throttle point, a fluid under pressure is applied to the throttle point by a pump, at least one operating parameter of the pump is acquired and stored, at least two reference operating parameters of two reference ...	10/22/2002
6425281	Pressure insensitive gas control system A pressure insensitive gas process device that includes a gas sensor and restrictions upstream and downstream of the gas sensor. The restrictions result in pressure drops upstream and downstream of the gas sensor which shield the gas sensor from upstream ...	07/30/2002
6401525	Leak detection in liquid carrying conduits A drogue capable of being inserted into a water pipe and comprising a flexible bar in which are a pressure sensor, a battery pack, an electronics assembly and a magnetometer. The bar is surrounded by a bladder with an inlet valve at the front and an outle...	06/11/2002
5894080	Use of a sampling apparatus for calibrating electronic mass/flow fraction meters in a pipeline In order to eliminate heavy and expensive test separators on board offshore platforms, the invention proposes to use a sampling apparatus, which is designed, shaped and adapted to take fluid samples isokinetically from a mass flow containing a two or mult...	04/13/1999
5554805	Flowmeter with a variable constriction A flowmeter with a main conduit having a constriction formed therein through which a main flow passes, and a by-pass conduit which is in fluid connection with the main conduit upstream and downstream of the constriction and in which a by-pass flow passes ...	09/10/1996
5400639	Carrier for mass air flow production line A carrier for the assembly, test and calibration of a mass air flow sensor on a production line. The support carrier consists of a structure having a well for receiving a first portion of the sensor head of the mass air flow sensor and a transverse air fl...	03/28/1995
5315859	Custom flow restrictor A set of selectable custom water flow restrictors is provided to limit water flow to a predetermined selected gallons-per-minute rate. The restrictor is inserted in-line upstream of the faucet, shower or other water appliance to which water passing throug...	05/31/1994
5259234	Calibration system for air metering bellmouths The present invention provides a system, including apparatus and method, using a National Bureau of Standards (NBS) traceable laser velocimeter for in situ calibration of a traversing static pressure probe used to determine a velocity distribution in an a...	11/09/1993
5113705	Functional testing of solenoid valves in air A solenoid valve that is to be used to control flow of a liquid medium is tested in a test fixture which applies a leak test, a flow test, and a response test using a gas as a test medium. The test results are compared with a test specification that has b...	05/19/1992
5107441	System for evaluating the flow performance characteristics of a device A system for determining the flow performance of a valve by first measuring certain flow parameters of the valve with the stem fixed in a plurality of different positions between full open and full closed and then calculating a value of flow coefficient f...	04/21/1992
4879662	Fluid flow self calibration scheme A fluid system for calibrating a variable area metering valve during flight when the fluid receiver is not in operation employs several single point fixed calibration orifices that are sequentially used to establish a corresponding number of calibration p...	11/07/1989
4838483	Vav valve control with transducer tolerance compensation The variable opening of a pressure independent supply air valve for a building ventilation system is controlled in response to a standard airflow transducer whose output is modified to emulate a close tolerance transducer. In a calibration mode, a microco...	06/13/1989
4729236	Automatic orifice calibrator An orifice is calibrated by passing air through the orifice and into a tube arrying a water column. The rate at which the water in the water column falls due to the passage of air through the orifice is measured to find the volumetric flow and elapsed time...	03/08/1988
4591093	Calibration apparatus for air flow controllers The present invention calibrates air flow controllers by simulating pneumatic signals present in typical heating, ventilating and cooling systems. The controllers receive pneumatic status signals and in response, operate dampers in the air ducts. Each con...	05/27/1986
4515012	Valve testing system utilizing an artificial atmosphere A test system for rapid and accurate testing of valves, especially delay valves for automotive applications, includes both an apparatus and test method. This test apparatus utilizes a reference pressure to avoid calculating a barometric adjustment to a me...	05/07/1985
4502318	Method and apparatus for calibrating flow meters The specification discloses a method and apparatus for calibrating liquid flow meters of all types. The system includes a scale for dynamically determining the weight of a liquid flowing through a flow meter, together with means for measuring the flow thr...	03/05/1985
4432230	Method and apparatus for calibrating pumps A method and apparatus are disclosed for calibrating the flow rate of a pump. The apparatus includes a high pressure pump, a critical flow orifice and a receptacle or air bag. The high pressure pump pumps a fluid, such as air, through the orifice into the...	02/21/1984
4419898	Method and apparatus for determining the mass flow of a fluid A method of determining the mass flow of a fluid comprising measuring a plurality of parameters comprising the pressure P, the temperature T and the density .rho. of the fluid, determining the specific gravity G of the fluid from the said parameters, and ...	12/13/1983
4366947	Calibrated gas-metering apparatus A calibrated gas-metering valve is disclosed which includes a two-part valve body having a gas inlet, a gas outlet, and a metering element therebetween. The metering element has a first and a second hole therein, which first and second hole intersect and ...	01/04/1983
4203316	Device and method for calibrating pulmonary function testing equipment A device and method for calibrating pulmonary function testing equipment by discharging a precise volume of compressed gas at reproducible and substantially exponentially diminishing flow rates through an orifice of a selected size into such equipment. Th...	05/20/1980
4194386	Variable area metering tube and method of manufacture A variable area metering tube is described having a non-linear graduated measuring scale wherein the scale compensates for non-standard variations in the cross-sectional flow area of the metering tube....	03/25/1980
4142401	Gage A gage for measuring the width of a gap. The gage includes a gaging conduit with an inlet and an outlet. Pressure means supplies gas to the inlet. A hot-wire anemometer is placed in the gaging conduit, and means is responsive to the condition of the anemo...	03/06/1979
4096746	Flow controller-flow sensor assembly for gas chromatographs and the like There is disclosed a flow controller-flow sensor combination especiably suited for gas chromatograph applications wherein a transducer monitors the pressure at the inlet and outlet of a flow restrictor element in the controller thereby to monitor the diff...	06/27/1978
4027523	Methods and apparatus for proof testing gas meters There is disclosed herein methods and apparatus for proof testing fluid meters, particularly gas meters of the positive displacement, diaphragm-operated type in which the number of cycles of operations of the valve mechanism of the meter is used as a fact...	06/07/1977
3994153	Variable flow resistance calibrator The calibrator device is used for calibrating the flow indicator (rotometer) of an air pollution sampling instrument known as a high volume air sampler which determines the concentration of the total suspended particulate in the ambient atmosphere. The ca...	11/30/1976

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Class 73/1.25 - Orifice or restriction