Class 137/804 - Responsive to condition external of system

Subclass of Class 137 - Fluid handling
Definition: Device or system which senses or detects or which is provided
No. of patents: 34
Last issue date: 11/28/2006

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Number	Title	Issue Date
7140233	Immersion lithography proximity sensor having a nozzle shroud with flow curtain The present invention is directed to an immersion lithography proximity sensor having a nozzle shroud with a flow curtain. The immersion lithography proximity sensor includes a shroud that affixes to the nozzle. A plenum is located inside the shroud that holds a shr...	11/28/2006
7134321	Fluid gauge proximity sensor and method of operating same using a modulated fluid flow A system and method that use a fluid gauge proximity sensor. A source of modulated unidirectional or alternating fluid flow travels along at least one path having a nozzle and a flow or pressure sensor. The fluid exists at a gap between the nozzle and a target. The ...	11/14/2006
7017390	Proximity sensor nozzle shroud with flow curtain The present invention is directed to an apparatus for reducing the impact of cross winds on gas flow emitted from a nozzle. The apparatus includes a shroud that affixes to the nozzle. A plenum is located inside the shroud that holds a shroud gas, which is fed into t...	03/28/2006
6924733	Hose separation transmitter system and methods A hose separation transmitter system includes a shock sensor and a transmitter that are secured to the delivery hose. If the hose becomes disconnected, the shock sensor will generate a shock signal when the hose falls to the ground and the transmitter will respond t...	08/02/2005
6901797	Method and instrument for gauging a workpiece An instrument is adapted to be attached to a rotational member of an instrument station for obtaining information about a workpiece. The instrument includes at least one orifice adapted to be placed in selective fluid communication with a source of fluid. An instrum...	06/07/2005
6669831	Microfluidic devices and methods to regulate hydrodynamic and electrical resistance utilizing bulk viscosity enhancers Methods and devices for inducing high bulk hydrodynamic resistance and/or for inducing low electrical resistance in microscale systems including bulk viscosity enhancers, surfactants, and electrolytes. High bulk hydrodynamic resistance is optionally utili...	12/30/2003
6424923	Method for computing three dimensional unsteady flows by solution of the vorticity equation on a Lagrangian mesh A method for computing three dimensional unsteady flows about an object. An allowable error is established for the vorticity term calculations, and object geometry is provided giving surface points on an object and a region of interest. A mesh is establis...	07/23/2002
5927335	Spherical chamber fluidic ball diverter valve A fluidic ball diverter valve for use in aerospace applications for diverting the output of a fluidic amplifier comprises a valve chamber having an inlet and two outlets. The orientation of the outlet valve seats is such that a line of action between the ...	07/27/1999
4945764	Constant gain laminar jet angular rate sensing device A laminar jet angular rate sensor senses inertial angular rate in flight control and stabilization systems for aircraft and other vehicles. The sensor utilizes fluid as a power source and may be interfaced directly with fluid powered actuators for closed ...	08/07/1990
4856338	Technique for null balancing fluidic circuits A null balanced fluidic sensing system that is less susceptible to pressure upply disturbances includes sensing and amplifying elements in a closed loop arrangement. The differential output of the sensor, developed as a result of an input stimulus, is fed ...	08/15/1989
4846233	System for selectively emptying or filling a tank This invention relates to a method and a system for selectively filling or emptying a tank by a filling or discharging device for the tank. In accordance with the invention, a passive responder and an aerial element of an electromagnetic detection system ...	07/11/1989
4823593	Flueric partial pressure sensors The temperature range for stable operation of a flueric partial pressure sensor (300) is improved by temperature-responsive means (80, 60) which vary with temperature change the suction applied by a flueric aspirator (27) in drawing gas through sensor bri...	04/25/1989
4775016	Downhole pressure fluctuating feedback system An improved feedback system for use with an oscillator carried in a bore hole is provided. The feedback system connects the output legs of a well bore oscillator to the feedback nozzles of the oscillator. It consists of a detachable housing that contains ...	10/04/1988
4630689	Downhole pressure fluctuating tool A downhole pressure fluctuating tool having an improved acoustical circuit using a fluid oscillator to generate out-of-phase pressure fluctuations in two output legs, one connected to an acoustical compliance inside the tool and the other connected to an ...	12/23/1986
4550614	Oscillatory flowmeter Each guide member of a fluidic oscillator has a diverter which acts to split the flow from the power nozzle into a control stream that is diverted toward the inlet of an associated feedback path and an output stream that is directed toward an output duct....	11/05/1985
4523611	Fluidic absolute-to-differential pressure converter A method and apparatus for converting the absolute pressure of a pressuri fluid to a differential pressure indicating the fluid pressure relative to a reference pressure. The pressurized fluid is directed asymmetrically into a laminar proportional amplif...	06/18/1985
4501293	Gas flow responsive signal output means Signal output means (11) responsive to gas flow and particularly suited for use in gas flow indicator apparatus (10), has first and second pressure-datum valves (24, 25) arranged in downstream order in a gas conduit (16), the second pressure-datum valve (...	02/26/1985
4484601	Liquid level control device A liquid level control device for controlling the flow of liquid into a reservoir, storage tank or the like, incorporating automatic shut-off characteristics. The device includes nozzle means including a fluid amplifier for automatically closing valve mea...	11/27/1984
4460018	Ultralow pressure relief valve An ultralow pressure relief valve (10) is disclosed. Sealing fluid (24) is held in place by capillary forces inside capillary tube (12). When pressure in tube (11) exceeds capillary forces, sealing fluid (24) is forced into reservoir (14), protecting pres...	07/17/1984
4445377	Pressure-to-electric output system for an angular rate sensor or the like A pressure-to-electric output system is used to convert the dual outlet pressure signals of a fluidic angular rate sensor to a pair of oscillating electrical signals whose relative frequency differential is very accurately indicative of the sensor outlet ...	05/01/1984
4407153	Flueric partial pressure sensors A flueric partial pressure sensor includes a flueric bridge having two bridge legs adapted for sensing a reference-gas and sample-gas mixture. A linear resistor and an orifice resistor are incorporated in each of the bridge legs which are conjoined to dis...	10/04/1983
4326559	Fluidic force transducer A fluidic accelerometer and electromagnetic transducer formed from a plurty of vertical laminations having a nozzle, a pair of outlets for receiving nozzle fluid and a flexible member as an extension of one of the laminations which forms a vertical wall ...	04/27/1982
4289126	Pressure regulator for breathing apparatus A pressure regulator for breathing apparatus which utilizes a low pressure control signal to control the inhalation of gases through the regulator. A first low pressure control valve is actuated by the diver's inhalation effort to provide a pressure signa...	09/15/1981
4277971	Fluidic oil viscometer A fluidic oil viscometer for determining the degradation of machinery lubating oils compares the viscosity of the machinery oil with the viscosity of another fluid, such as air. Both the viscosity of the air and the viscosity of the oil are sensed, using...	07/14/1981
4265116	Fluidic temperature sensor A fluidic analog temperature sensor which compensates for variations in the supply pressure to the temperature sensor....	05/05/1981
4258754	Method and apparatus for fluid sound amplification and detection of low frequency signals A new method and apparatus for fluid sound amplification and detection having enclosed within a predetermined sized housing a fluid supply emitter in combination with a signal input port and spaced a predetermined distance therefrom along an axis offset a...	03/31/1981
4170894	Means, employing a fluidic oscillator, for determining the density of gas In order to determine the density of a test gas, the test gas is employed as the working fluid through an astable fluidic oscillator. Air, at the same temperature and pressure, is passed through the same or a like fluidic oscillator to obtain a second pul...	10/16/1979
4046008	Fluidic temperature sensor A fluidic oscillator temperature sensor assembly for determining the average temperature of a stream of flowing gas in a conduit such as the turbine inlet of a gas turbine engine comprises a source of pressurized gas, a fluid amplifier connected to the so...	09/06/1977
4007625	Fluidic oscillator assembly A fluidic oscillator assembly including a fluidic oscillator having an inlet and two outlets, and a piezoelectric element for picking-up frequency oscillations induced in the fluid oscillator, the piezoelectric element being located at and closing one of ...	02/15/1977
4003242	Device for determining the mixing ratio of binary gases Device for determining the mixing ratio of binary gases in a mixture thereof by measuring the velocity of sound in the gas mixture, the value of the velocity of sound in the gas mixture determined by the oscillating frequency of a fluidic oscillator, the ...	01/18/1977
3998574	Processed-paced, fluidic control system for molding machines A system for controlling a molding machine utilized to mold food products on a stick. The system incorporates fluidic logic elements that are responsive to signals generated by the piston position in actuation cylinders so that the system control is depen...	12/21/1976
3986526	Hybrid fluidic and fluid servo controller A train of fluid pulses representative of a process variable is processed by digital fluidic circuits and is then converted into an analog fluid pressure signal which is compared to an analog command signal, the difference between the two compared signals...	10/19/1976
3971257	Laminar jet linear accelerometer A laminar jet linear accelerometer includes a plenum chamber to which prerized fluid is supplied and a nozzle operatively associated with the chamber for issuing the fluid in the form of a jet. The jet is conducted into another chamber, which is vented t...	07/27/1976
3942556	Fluidic sensor Disclosed is a fluidic sensor of the proximity type with improved sensing range and response. The sensor generally comprises an inner and outer tubes with an annular passageway therebetween. Air or the like under a low pressure (e.g. 4 pounds per square i...	03/09/1976

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Class 137/804 - Responsive to condition external of system