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7377184 |
Multipurpose centralized flow detector
A non-intrusive flow detector consists of an optical sensor assembly that attaches non-obstructively and non-invasively to a fluid flow meter. The sensor monitors dial movement of a least flow dial...
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7302863 |
Software correction method and apparatus for a variable orifice flow meter
A method of improving the accuracy of a variable orifice flow meter that includes characterizing the flow coefficient of the flow meter orifice for different orifice openings and for different...
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7270143 |
Offset variable-orifice flow sensor
An offset variable orifice gas flow sensor is provided. The variable orifice gas flow sensor comprises two port portions. The central axes of these port portions are offset such that an interior...
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7131451 |
Apparatus for controlling and metering fluid flow
A device for metering and controlling fluid flow includes a variable orifice and is configured to use a pressure sensor. The device includes a fluid flow conduit having at least one planar inner...
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7096744 |
Software correction method and apparatus for a variable orifice flow meter
A method of improving the accuracy of a variable orifice flow meter that includes characterizing the flow coefficient of the flow meter orifice for different orifice openings and for different...
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7082843 |
Fluid flow measurement device
The invention is directed to a device for obtaining flow rate measurements including a sensor assembly and a housing. The sensor assembly includes a body defining a first fluid flow passage having...
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7082842 |
Software correction method and apparatus for a variable orifice flow meter
A method of improving the accuracy of a variable orifice flow meter that includes characterizing the discharge coefficient of the flow meter orifice for different orifice openings and for different...
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6898984 |
Measuring apparatus to determine the flow of a fluid
A measuring apparatus ( 1 ) for determining the flow (Q) of a fluid ( 2 ). The apparatus has a hollow body ( 3 ), with an inflow ( 4 ) and an outflow ( 5 ) for the fluid ( 2 ). A magnetic sample (...
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6892586 |
Measuring and controlling the flow of flowable materials
A method of determining an inlet flow rate (F inlet ) of a flowable material including passing an inlet stream of flowable material through a chamber ( 20 ) having an outlet aperture ( 100 );...
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6874374 |
Flowmeter apparatus
A flowmeter is described which has a retrievable housing conduit which is locatable within a conduit or pipe and which seals against the pipe so that fluid only flows through the housing conduit,...
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6668665 |
Gas level monitoring system and gas flow rate sensor used therein
An in-line gas flow rate sensor includes a movable flow orifice and a fixed flow restrictor adjacent the flow orifice for changing the gas flow through the flow orifice. The flow orifice and the...
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6619138 |
Apparatus for dynamically adjusting size of an orifice to increase accuracy in measuring the rate of air flow
A flow adapter for measuring the rate at which air flows into the brake pipe. The adapter includes a housing, a flow valve and a transducer. The primary passage of the housing contains a primary...
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6539813 |
Throttle structure and flow meter incorporated with throttle structure
A flow meter for measuring a flow rate of a fluid passing through a fluid passage is provided with a throttle structure disposed at the inside, and it is connected to the fluid passage. The fluid...
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6508071 |
Air conditioner and displacement control valve for variable displacement compressor
A control valve is located in a variable displacement compressor incorporated in a refrigerant circuit. The control valve controls the displacement of the compressor in accordance with a pressure...
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6405577 |
Flow rate detector mechanism with variable venturi and exhaust gas sampling method using the same
A flow rate detector mechanism using variable Venturi therein, comprising: a variable flow rate generator, comprising: a core 11; and a variable Venturi 12; wherein a throat (flow passage)...
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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,...
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5979247 |
Flow sensor having a fixed resistance and a variable resistance
A flow sensor which is used for measuring the flow rate of a gas is disclosed. The flow sensor comprises a flow tube for allowing a gas to be circulated therethrough, a resistance is arranged so as...
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5970801 |
Variable orifice flow sensor
A variable orifice flow sensor includes a flow conduit member defining a flow orifice and fluidly connecting first and second fluid flow ports, a flapper of magnetizable sheet metal that is mounted...
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5937970 |
Compressed air lubricators
A flow sensor of the disc type for a compressed air lubricator comprises a flexible elastomeric disc having a pair of radial channels formed in each of its major surfaces. The channels afford lines...
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5880378 |
Critical flow venturi with variable and continuous range
A critical flow venturi with either a movable centerbody or a fixed replaceable centerbody is provided for fluid flow measuring or fluid flow control by changing the critical flow rate area of the...
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5763792 |
Respiratory flow sensor
A respiratory flow sensor to be connected between a breathing tube and an endotracheal catheter, which has a flow channel, an orifice, which is formed by a foil recessed in the flow tube, in which...
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5747702 |
Diagnostic device for hydraulic circuit
A diagnostic device for a hydraulic circuit includes a flow transducer to provide an indication of flow rate, a pressure transducer to provide a signal indicative of pressure, and a temperature...
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5698793 |
Flow meters
A flow meter comprises a divergent nozzle region 6 and a plug 10 which is axially displaceable within the nozzle region 6 under the influence of a flowing fluid. The plug 10 is guided, during...
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5672833 |
Peak flow meter for measuring ventilatory capacity
A peak flow meter has a body forming a chamber along which a piston can be moved against the force of a spring by a subject exhaling through an inlet into the chamber. A slot runs along a side of...
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5665923 |
Full range-high accuracy air flow sensing device
An air flow sensing device comprised of rotatable spaced dampers, shafts to rotate the dampers, a counter-weight attached to a shaft biasing the dampers to a closed position with respect to air...
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5654512 |
Flexible membrane variable orifice fluid flow meter
A flexible membrane variable orifice fluid flow meter which comprises a body, having a fluid conducting passageway therethrough, where the passageway has a first lateral width and second lateral...
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5627324 |
Peak flow meter
A peak flow meter is provided comprising an elongated body having a longitudinal direction and a predetermined cross sectional shape and a growing area. The body has an open entering end and an...
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5458007 |
Bi-directional flow indicator
Disclosed is a flow indicator including a tubular body containing a rod and a magnetized orifice member moving along the rod. The rod has a central ridge of greatest cross-sectional area, tapers...
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5351557 |
Rotary flowmeter with varying area channel
A rotary type of flowmeter having an orifice directing the flow toward a moveable needle. The needle moves within a channel that has a varying cross-sectional area in a plane transverse to the...
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5303738 |
Control valve
A control valve includes a tubular member and a truncated conical helix spring received in the tubular member. A diverging open end of the helix spring is fixed adjacent to a first open end of the...
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5253536 |
Rotary flowmeter with variable inlet
A rotary type flowmeter having a variable orifice through which the flow to be measured is directed toward a rotatable needle. A preload is also applied and which may be varied as desired. By the...
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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...
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5153823 |
Device to measure and/or control flow-through and/or quantity of heat
A device for measuring or controlling a property of a flow medium comprises a conduit which carries a flow medium. A choke element located in the conduit has a first open operating position and a...
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5125753 |
Device to measure flow-through and/or quantity of heat
A heat circuit comprises an initial conduit containing a flow medium and a return conduit. A choke element located in a conduit such as the initial conduit of a heat circuit serves to control the...
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5079943 |
Method of calibrating a volumetric fluid flow sensor
A method is disclosed calibrating a volumetric fluid flow sensor having a pole magnet armature in which a direction of reciprocation of the armature is co-linear with a magnetic axis thereof and in...
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5038621 |
Variable area obstruction gas flow meter
A flow meter including a variable area obstruction which is mounted in a conduit. Inputs to a differential pressure transducer are positioned in the conduit on opposite sides of the obstruction to...
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5033312 |
Gas flow meter housing
A variable gas flow meter for obtaining a differential pressure across a membrane having a variable area orifice. The orifice is defined by a hinged flap which swings open in the direction of gas...
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5033311 |
Volumetric fluid flow sensor
A volumetric fluid flow sensing system includes a pole magnet armature in which the direction of reciprocation of the armature is co-linear with its magnetic axis and, includes a magnetic field...
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4993269 |
Variable orifice flow sensing apparatus
An apparatus for detecting fluid flow by obtaining a differential pressure across an obstruction in a fluid conveying channel. The obstruction is hingably connected to the housing of the channel....
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4938076 |
Target fluid flow indicator gauge
A target fluid flow indicator gauge comprising a non-magnetic housing defining inflow and outflow ports and a cross channel including a rounded portion that is curvilinear about an axial center...
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4918994 |
Gas meter
Method and device for measuring a quantity of gas flowing through a pipe (1) provided with an adjustable restriction (3) having a number of selectable different restriction areas (A), each having...
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4905844 |
Method for monitoring ranges of volumetric fluid flow
A method for monitoring the existence or non-existence of a given range of volumetric fluid flows through an input channel by correlating the same to a range of sensitivity of a magnetic sensor to...
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4875377 |
Flowmeters
A flowmeter utilizing the property of dry saturated steam that the density of the steam is dependent upon the temperature thereof has a first sensor that is a rotation sensor (1) which includes a...
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4864871 |
Transducer for fluid flow
A flow transducer with a variable orifice formed between a conical valve member tapering in the downstream direction and a sliding piston located downstream of the valve member. A throat member is...
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4838093 |
Flow meter and method of measuring flow
The invention includes a wall member which defines an expandable volume having a fluid inlet and a fluid outlet. The expandable volume varies in size as a function of fluid flow rate, and the...
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4827774 |
Flow sensing device
A device for sensing fluid flow comprises a housing having an inlet and an outlet and defining a fluid flow channel between the inlet and the outlet, a first member disposed in the fluid flow...
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4825747 |
Method and device for detecting a fluid flow rate
A method and device are provided for detecting a fluid flow rate, said device comprising a body in which is formed a passage for the fluid, said passage comprising at least two cross sections of...
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4823552 |
Failsafe electrohydraulic control system for variable displacement pump
An electrohydraulic system for control of a variable output pump includes a microprocessor-based controller receiving inputs from condition sensors coupled to the pump and command inputs from a...
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4811607 |
Flow sensor
A flow sensor comprises a body (4) formed with a through bore (5), at least one fluid inlet (6, 7) and one fluid outlet (7,6) for permitting ingress and egress of fluid to and from the sensor, and...
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4790194 |
Flow measurement device
Fluid flow is determined for a large flow pipe based upon differential pressure across an orifice in the pipe having a known cross-sectional area. In one form, the orifice is variable and adjusted...
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