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| Number | Title | Issue Date |
| 7992444 | Pressure detection device and pressure detection method The pressure detection device includes a buffer member deformable by a pressure change, including one or more magnets, and a sensor assembly including one or more magnetic sensors to detect a variation of a magnetic field accompanied by deformation of the buffer mem... | 08/09/2011 |
| 7735373 | Apparatus for measuring pressure in a vessel using magnetostrictive acoustic transducer The present invention relates to an apparatus for measuring pressure inside a vessel using a magnetostrictive acoustic transducer. The apparatus includes a magnetostrictive acoustic transducer, including an exciting coil unit wound on a first magnetization yoke disp... | 06/15/2010 |
| 7694573 | Mechanically calibrated analog transducer for position or a related physical quantity An analogue position transducer, usable for example as a pressure switch in a household appliance, includes a rigid casing accommodating a deformable membrane sensitive to hydraulic pressure, a first element engaged to the membrane so as to be mobile along with at l... | 04/13/2010 |
| 7677108 | Accurate pressure sensor The invention relates to a pressure sensor capable of measuring pressure accurately, and more particularly, to a pressure sensor comprising a box-shaped magnet, optionally having an inclined upper surface with a right side portion protruding higher than a left side ... | 03/16/2010 |
| 7444878 | Resonant frequency pressure sensor A pressure sensor (S) includes an antenna member (10) that is adapted to be resonantly responsive to a desired frequency of electromagnetic radiation (12). An inductance changing body formed from a compressible dielectric material (14) is positi... | 11/04/2008 |
| 7435229 | System for transcutaneous monitoring of intracranial pressure (ICP) using near infrared (NIR) telemetry A system for measuring and converting to an observer intelligible form an internal physiological parameter of a medical patient. The invention allows transcutaneous telemetry of the measured information intracranial pressure via a system which includes a patient imp... | 10/14/2008 |
| 7421903 | Internal pressure simulator for pressure sensors In oil-filled pressure sensors, the measured pressure is applied to a compliant isolation diaphragm, which causes the pressure of the internal oil to increase until it equals the external pressure. The pressure is sensed by a pressure sensing capsule, such as a MEMS... | 09/09/2008 |
| 7404331 | Sensor assembly, transformers and methods of manufacture A sensor assembly is provided. The sensor assembly includes a sensor configured to measure an impedance value representative of a sensed parameter and a transformer coupled to the sensor. The transformer includes at least one ceramic substrate and at least one elect... | 07/29/2008 |
| 7347099 | Pressure transducer with external heater An improved pressure transducer is disclosed. The transducer includes a connector, an enclosure, a sensor portion, and an external heater disposed to heat the sensor portion. In some aspects, the sensor portion includes a sensor constructed from a brittle material a... | 03/25/2008 |
| 7331225 | Non-contact type liquid level sensor A non-contact type liquid level sensor according to the invention has an electromagnetic shield plate mounted on a housing for blocking effects from an external magnetic field onto a magnetoelectric converting element. ... | 02/19/2008 |
| 7284437 | Device and method for the status monitoring of a pressure measuring unit The invention relates to a device and a method for the status monitoring of a pressure measuring unit in an absolute or differential or relative pressure transducer, a pressure-sensitive element installed in the pressure measuring unit being impinged with at least o... | 10/23/2007 |
| 7281490 | Gauge having a magnetically driven pointer rotation device A gauge for indicating a measured variable such as pressure. The gauge includes a motion detection device including a drive magnet that is adapted to be moveable in response to changes in the variable. The pointer rotation device includes a pivot member, a power mag... | 10/16/2007 |
| 7261005 | Magneto-elastic resonator torque sensor A magneto-elastic torque sensor and system include a substrate and a magneto-elastic sensing component formed from or on the substrate. The magneto-elastic sensing component and the substrate together form a magneto-elastic torque sensor, which when subject to a str... | 08/28/2007 |
| 7249518 | Sensors based on giant planar hall effect in dilute magnetic semiconductors Ferromagnetic semiconductor-based sensor devices, including sensors for detecting pressure changes and sensors for detecting magnetic fields, such as switching events in a magnetic recording medium. The pressure sensors of the present invention detect pressure chang... | 07/31/2007 |
| 7249517 | Pressure transmitter with power cycled hall effect sensor The invention disclosed herein is a pressure transducer utilizing a Hall effect sensor to detect the displacement of the transducer's diaphragm. The pressure transducer includes a power supply to draw current from a 4 mA to 20 mA current loop and deliver current to ... | 07/31/2007 |
| 7219552 | Scalable high sensitivity magnetostrictive pressure sensor A pressure sensor 10 includes a casing 12 configured to be able to be filled with a fluid 16 such as a liquid or a gas, in which at least part of a surface contacting this fluid 16 is formed of a giant magnetostrictive member 18 ma... | 05/22/2007 |
| 7219554 | Semiconductor pressure sensor A semiconductor pressure sensor is not influenced by a charged object in a fluid to be measured or an electric field from the outside, so satisfactory sensitivity and accuracy can be ensured. The semiconductor pressure sensor is provided with a diaphragm 4 th... | 05/22/2007 |
| 7213464 | System for visually monitoring pressure in an enclosed space A compliant balloon having an outer reflective surface which is positioned next to a transparent window which has an opaque element thereon, the reflection of the opaque element from the outer reflective surface of the balloon being visible when the outer reflective... | 05/08/2007 |
| 7201059 | Magnetic force sensor assembly for workholding fixtures A magnetic force sensor assembly for a workholding fixture includes a magnetic force switch operatively supported by a base of a component disposed on the workholding fixture. The magnetic force sensor assembly also includes a sensor operatively supported by the bas... | 04/10/2007 |
| 7162927 | Design of a wet/wet amplified differential pressure sensor based on silicon piezoresistive technology The invention provides pressure sensors for use in wet environments. A pressure sensor package according to the invention has a housing having a pair of cavities separated by a wall member. Sequentially contained within one cavity is a conductive elastomeric seal pa... | 01/16/2007 |
| 7150196 | Electromagnetic valve and mounting method thereof If a pressure sensor is increased in size and therefore the inside diameter of a yoke is increased, a stopper is provided with a large-diameter portion. The large-diameter portion makes it possible to reduce the air gap between the stopper and the yoke and therefore... | 12/19/2006 |
| 7104137 | Magnetostrictive fluid-pressure sensor A magnetostrictive fluid-pressure sensor includes annular inner and outer cylinders, a first connector, annular second and third connectors, and first and second coils. The inner cylinder surrounds a fluid-receiving bore. At least one of the cylinders is a magnetost... | 09/12/2006 |
| 7059194 | Pressure fault device The invention involves a pressure fault device for indicating a threshold pressure or a threshold differential pressure. The present invention provides a cost effective way to determine where a pressure problem has occurred. The device includes a housing having at l... | 06/13/2006 |
| 6992492 | Capacitive sensor A capacitive sensor is disclosed that includes a variable capacitor transducer that varies its capacitance with changes in an environmental parameter. The present invention is adapted to measure any linear parameter such as pressure, force, or distance. The sensor o... | 01/31/2006 |
| 6960911 | Strain sensor A strain sensor includes a sensor section having a magnetic material provided on one surface of a conductor, the magnetic material being formed integrally with the conductor and having a magnetic strain constant with an absolute value larger than 1×10−7 | 11/01/2005 |
| 6949924 | Electromechanical rotation sensing device An electromechanical rotation sensing device includes a mechanical sensing system for sensing a physical parameter; a rotational member rotated by the mechanical sensing system in response to the parameter sensed; a magnetic device movable with the rotational member... | 09/27/2005 |
| 6935169 | Tire pressure sensor array A tire pressure sensor array includes a control module to which a receiver is connected. Four tire pressure sensors communicate with the control module via the receiver. Each tire pressure sensor includes a pressure switch that is electrically connected to a digital... | 08/30/2005 |
| 6910382 | Sensors based on giant planar hall effect in dilute magnetic semiconductors Ferromagnetic semiconductor-based sensor devices, including sensors for detecting pressure changes and sensors for detecting magnetic fields, such as switching events in a magnetic recording medium. The pressure sensors of the present invention detect pressure chang... | 06/28/2005 |
| 6782753 | Thermodynamic pressure/temperature transducer health check A device and procedure for checking the health of a pressure transducer in situ is provided. The procedure includes measuring a fixed change in pressure above ambient pressure and a fixed change in pressure below ambient pressure. This is done by first sealing an en... | 08/31/2004 |
| 6668657 | Pressure sensor A pressure sensor for a motor vehicle includes a sensor housing and a base. A pressure bore through the base leads to a pressure space delimited on one side by the base and on the opposite side by a diaphragm connected sealingly to the base. An actuating ... | 12/30/2003 |
| 6634227 | Level probe for powder container The invention relates to a level detecting system for a powder container of a powder-coating apparatus. It contains an inductive proximity sensor (22) and an electrically insulating membrane (28) which is displaceable to-and-fro the proximity sensor and w... | 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 |
| 6591688 | Load sensing by partial magnetic saturation A load applied to a load cell's load-bearing member (21) causes that member to move against the force applied by springs (28 and 30) and thereby bring a magnet (24) into closer proximity to the ferromagnetic core (12) of a coil (10). Acting across a small... | 07/15/2003 |
| 6532822 | Resonant torsion pendulum pressure sensor A pressure responsive mechanically resonant sensor device is provided that comprises a torsion pendulum driven at resonance. The pressure sensor includes a rigid frame to which is affixed a torsion pendulum comprising a hollow tube and a resonant mass as ... | 03/18/2003 |
| 6499353 | Method and apparatus for remote measurement of physical properties inside a sealed container A method and an apparatus for measuring the pressure or other physical quantities of a gas or a liquid in a sealed container without penetrating the container. Two permanent magnets, one located on a sensing unit inside the container and one located on a ... | 12/31/2002 |
| 6484586 | Differential pressure transducer A differential pressure transducer has a measurement chamber which is divided by a membrane into first and second measurement spaces which can be exposed to first and second pressures whereby differential pressure causes deflection of the membrane from it... | 11/26/2002 |
| 6393921 | Magnetoelastic sensing apparatus and method for remote pressure query of an environment A pressure sensing apparatus for operative arrangement within an environment, having: a sensor comprising a hermetically-sealed receptacle, at least one side of which has an flexible membrane to which a magnetically hard element is attached. Enclosed with... | 05/28/2002 |
| 6255609 | High pressure resistant, low pressure actuating sensors Sensors for mounting in fluid chambers respond electrically to low pressures in the fluid, while resisting damage or leakage at high pressures. A flexible diaphragm, mounted at one end of a housing, is sandwiched between first and second annuli, leaving a... | 07/03/2001 |
| 6182514 | Pressure sensor for sealed containers A magnetic pressure sensor for sensing a pressure change inside a sealed container. The sensor includes a sealed deformable vessel having a first end attachable to an interior surface of the sealed container, and a second end. A magnet mounted to the vess... | 02/06/2001 |
| 6089098 | Differential pressure switch having an isolated hall effect sensor A differential pressure switch comprising an enclosure including a peripheral wall and a solid one-piece non-perforate partition wall that is integrally attached to the peripheral wall around the entire perimeter of the partition wall. The enclosure inclu... | 07/18/2000 |
