Class 73/733 - With electrical readout

Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein the tubular pressure responsive element
No. of patents: 32
Last issue date: 03/04/2008

Number	Title	Issue Date
7338215	Cable termination An optical cable termination includes a termination body and a pressure test section. The pressure test section includes a body configured to be press fit, screwed or otherwise attached to an end of the termination body and at least one test port. The pressure test ...	03/04/2008
7334484	Line pressure measurement using differential pressure sensor A pressure sensor assembly for sensing a pressure of a process fluid includes a sensor body having a cavity formed therein to couple to a process fluid pressure. A deflectable diaphragm in the cavity deflects in response to the first and second process fluid pressur...	02/26/2008
7308830	Pressure sensor fault detection A diagnostic system for a pressure sensor having a cavity configured to receive on applied pressure is provided. The cavity has a first and a second wall. A deflectable diaphragm is positioned in the cavity and configured to form a first and a second capacitance wit...	12/18/2007
7262693	Process field device with radio frequency communication A field device for use in an industrial process control or monitoring system includes terminals configured to connect to a two-wire process control loop. The loop carries data and provides power to the field device. RF circuitry in the field device is provided for r...	08/28/2007
7228743	Light powered pressure gauge An extremely low power transducer for use with a meter is able to be powered by miniature solar cells to measure and display a physical quantity such as pressure, force, level or distance. The transducer provides a variable capacitance to an electronic circuit that ...	06/12/2007
7159653	Spacer sub The present invention involves a method and apparatus for communicating from within a wellbore to the surface of the wellbore, as well as communicating from the surface of the wellbore to downhole within the wellbore. More specifically, the present invention involve...	01/09/2007
7140257	Wireless transmitting pressure measurement device A pressure measurement device includes a housing having an inlet, a transducer coupled to the inlet to generate an electrical signal representative of pressure at the inlet, and a data communication device coupled to the transducer to transmit a wireless signal corr...	11/28/2006
7124642	Dual gauge with dual calibration system and method A dual gauge system determines pressures of two separately contained gases by use of two separate pointer—Bourdon tube sections within the dual gauge. The Bourdon tube of a first one of the sections is gaseously coupled to a first one of the contained gases to det...	10/24/2006
7043992	Pressure indicator A pressure indicator comprising a piston which is displaceably mounted in a housing counter to the pressure of a spring on an axis and which can be impinged upon with pressure which is to be measured; also comprising optical display means actively cooperating with t...	05/16/2006
6915686	Downhole sub for instrumentation A downhole sub for instrumentation, such as a fiber optic sensor. The sub is configured to be connected to a string of pipe, such as a string of tubing. The sub first comprises an essentially concentric tubular body. The tubular body has an inner diameter that gener...	07/12/2005
6636155	Gauge having adjustable activating means A mechanical gauge having a mechanism for setting multiple alarms within tolerance values. When such tolerance values defined by the mechanism are reached, the same mechanism activates an alarm....	10/21/2003
6626045	Pressure measurement device A pressure measurement device comprising a housing enclosing an elastic pressure measurement element and a magnet attached to the measurement element. First and second Hall sensors operatively positioned near the magnet are connected to an electrical circ...	09/30/2003
6591684	Pressure sensor intergrated into an electro-hydraulic control unit A pressure sensor is mounted upon a hydraulic valve body. The sensor has a base which extends into a bore formed in the valve body. The valve body bore is in communication with a pressurized hydraulic fluid. A cover that is removably attached to the valve...	07/15/2003
6530281	Mechanical pressure gauge having digital output A pressure gauge includes a Bourdon tube coupled to a pinion of a spindle with a link and a sector gear, and to rotate the spindle in correspondence with a pressure in the Bourdon tube. The rotational movement of the spindle or the deformation of the Bour...	03/11/2003
5877426	Bourdon tube pressure gauge with integral optical strain sensors for measuring tension or compressive strain A Bourdon tube pressure gauge is mounted for sensing the pressure of a system. The Bourdon tube is connected to at least one optical strain sensor mounted to be strained by movement of the Bourdon tube such that when the Bourdon tube is exposed to the pre...	03/02/1999
5744727	Pressure gauge Pressure gauge for very high pressures based upon a principle similar to the Bourdon tube, comprising a beam-shaped measuring element having an elongate cavity lying eccentrically in the cross section of the measuring element, and being supported by a hol...	04/28/1998
5675317	Residual pressure sensor and residual pressure sensor monitoring apparatus A residual pressure sensor for verifying that a residual pressure is zero, and to a monitoring apparatus for monitoring for faults in the residual pressure sensor. In order to detect that a residual pressure has completely gone, the residual pressure sens...	10/07/1997
5363703	Dual transducer A pressure transducer system for developing accurate pressure measurements with a torque driven pressure transducer where the transducer has dual capacitor devices in tandem and mechanically coupled to permit relative displacement along a elongated axis i...	11/15/1994
5317918	High resolution pressure sensor A pressure sensor comprises a pair of pressure compartments with deflective end walls and an elongated displaceable member with two extremities respectively anchored to the deflective end walls of the two pressure compartments, and a capacitor with first ...	06/07/1994
5286931	Gauge with indicator switch A pressure gauge and indicator switch wherein a Bourdon tube and electrical switch are sealably contained within a liquid-filled compartment, and a liquid pathway is provided between the Bourdon tube and an external fitting. The electrical switch leads ar...	02/15/1994
5230250	Capacitor and pressure transducer A dual capacitor device for utilizing dependent capacitances for measurement purposes where an upper capacitor base member and a lower capacitance base member are arranged with parallel capacitor surfaces in horizontal planes and where the parallel capaci...	07/27/1993
5207767	Capacitor and pressure transducer A dual capacitor device for utilizing dependent capacitances for measurement purposes where a first capacitor base member and a second capacitance base member are arranged with parallel capacitor surfaces in parallel planes and where the parallel capacito...	05/04/1993
5168419	Capacitor and pressure transducer A dual capacitor device for utilizing dependent capacitances for measurement purposes where an upper capacitor base member and a lower capacitance base member are arranged with parallel capacitor surfaces in horizontal planes and where the parallel capaci...	12/01/1992
4873870	Micro displacement force transducer A sensor system utilizing a bourdon tube to generate a force as a function of pressure to deflect a diaphragm in a capacitor device where the diaphragm varies capacitance values of the capacitor device as a function of the applied force. The capacitor dev...	10/17/1989
4805448	Downhole pressure and/or temperature gauges A pressure or temperature gauge includes a Bourdon tube which is coupled via a shaft to transmit rotation to a stylus carried by the shaft which makes a record on a cylindrical chart which moves axially of the shaft at a constant rate. The shaft is divide...	02/21/1989
4599902	Condition responsive apparatus A condition responsive apparatus is provided including a pressure gauge having a Bourdon tube expandable in response to an external pressure. In the preferred embodiment, an optical coupler, including a solid state light source and a detector, is mounted ...	07/15/1986
4586383	Electronic pressure gauge and flow meter A pressure gauge includes a cylindrical member having a flexible plate covering one end. Center flex of the plate is used to measure the force applied by fluid pressure. A low pressure transducer electrically measures the applied force. Pressure is transm...	05/06/1986
4502334	Combined pressure gauge-transmitter A Bourdon tube adapted for connection to a source of fluid pressure operates both a mechanically driven gauge pointer and an optical-electronic transmitter for providing operatively parallel output signals corresponding to values of pressure incurred by t...	03/05/1985
4455874	Digital pressure transducer A digital pressure transducer is formed by mounting a force-sensitive resonator to a structure of nonsymmetrical configuration which produces loads under applied pressure. The frequency of the resonator is measured to provide a digital indication of the a...	06/26/1984
4292840	Fuel consumption efficiency gauge A simple fuel consumption efficiency gauge employs a pointer mechanically coupled to the extremity of a Bourdon gauge. The pointer is electrically coupled to vehicle ground and is bracketed by two contact posts associated with high and low fuel consumptio...	10/06/1981
4279155	Bourdon tube transducer A bourdon tube transducer has included a bourdon tube with a conductive plate electrically separated from the bourdon tube and in parallel with the bourdon tube. As the pressure varies, so does the electrical reactance between the bourdon tube and the con...	07/21/1981
4184377	Hydraulic pressure transducer with electrical output A hydraulic transducer of the Bourdon tube type, in which the amount of light transmitted by a light emitting diode to a photoresistor is controlled by a shutter. The device provides an enclosed and compact transducing unit which has particular applicatio...	01/22/1980

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Class 73/733 - With electrical readout