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| Number | Title | Issue Date |
| 8186225 | MEMS vacuum sensor based on the friction principle The invention relates to a sensor element for pressure measurement, having a substrate (5) and at least one mass element (1), which is arranged spaced apart from the substrate (5) and is connected in an oscillating manner to the substrate (5 | 05/29/2012 |
| 8136406 | Pressure transducer with piezoelectric crystal for harsh environment use A pressure transducer comprising a housing and a piezoelectric resonator in the housing, wherein the resonator is made of a piezoelectric crystal having Curie temperature greater than 1000° C. or having no Curie temperature up to its melting point greater than 1000... | 03/20/2012 |
| 8006562 | Atmospheric pressure measuring apparatus and method of measuring atmospheric pressure A receiver receives an acoustic wave in an atmospheric pressure measuring apparatus. Since a variation in the intensity of an acoustic wave reflects a variation in the atmospheric pressure, the atmospheric pressure can be measured based on the intensity of the acous... | 08/30/2011 |
| 8006563 | Surface acoustic wave pressure sensor A sensor chip has a substrate and a comb-teeth electrode arranged on the substrate. The sensor chip is fixed to a diaphragm structure to be distorted by receiving pressure, and is fixed to the diaphragm structure only through a predetermined fix area so as to detect... | 08/30/2011 |
| 7874215 | Accelerometer including diaphragm and power generator and motor including same An accelerometer includes a pressure transducer; and a vibration-to-pressure converter (VPC). The VPC may include a housing mechanically coupled to an object to be measured, and a diaphragm sealing the housing to form a chamber, the chamber being fluidly coupled to ... | 01/25/2011 |
| 7798005 | Resonator measurement device and method employing the device The invention relates to a device and a method for detecting a fault in a measurement device comprising a resonator and means for measuring a resonant frequency of the resonator. According to the invention, the device further includes means delivering information (S... | 09/21/2010 |
| 7798006 | Post assembly automatic adjustment of TPMS sensor preload A method of manufacturing a pressure monitoring package comprises the steps of mounting a plurality of resonators onto a substrate 1, mounting the substrate 1 in a package base 11, mechanically constraining the package base 11 within a me... | 09/21/2010 |
| 7793548 | Pressure determination device and method for operating a pressure determination device The invention relates to a pressure determination device for determining the pressure in a fuel storage arrangement, with a connection element for connecting the pressure determination device to the fuel storage arrangement, a first chamber, a connecting line for co... | 09/14/2010 |
| 7726195 | Accelerator/brake control using acoustic sensing A pressure sensitive acoustic wave sensor and actuator include an acoustic wave cavity foπned in a substrate, a transducer generating an acoustic wave substantially trapped in the acoustic wave cavity and an acoustic wave absorbing member that absorbs more acoustic... | 06/01/2010 |
| 7703328 | Pressure sensor utilizing a low thermal expansion material A pressure sensor for use in measuring the pressure within fluids. The sensor comprises a medium whose material has a low coefficient of thermal expansion. The pressure can be measured by observing how signals pass through the medium at some unknown pressure and the... | 04/27/2010 |
| 7444245 | Field device for determining and/or monitoring a process variable Field device for determining and/or monitoring at least one process variable of a medium in a container. The field device includes: at least one mechanically oscillatable unit connected with the container via a process connection; and at least one driver/receiver un... | 10/28/2008 |
| 7415883 | Method for protecting resonating sensors and open protected resonating sensors A protected resonating sensor may include at least one resonating sensor unit, each sensor unit has one or more vibratable members. The protected sensor includes at least one body of gel for protecting the vibratable member(s) of the sensor. The gel may be disposed ... | 08/26/2008 |
| 7398689 | Piezo inkjet printer An inkjet printer containing a substantially closed ink duct and a transducer used to generate a pressure wave in the duct, wherein the transducer comprises a first part and, separate from the first part, a second part whereby, by actuation of the transducer, the fi... | 07/15/2008 |
| 7398690 | Acoustic pressure sensor An acoustic pressure sensor includes a stack of one or more acoustically responsive elements which are contained within a housing. An external acoustic pressure to be sensed is transmitted to the stack via a diaphragm which exists in an end cap closing a top portion... | 07/15/2008 |
| 7380459 | Absolute pressure sensor An absolute pressure sensor is provided comprising a vibration sensing element such as a piezoelectric element disposed on a vibratable seal. The seal is disposed between two gas spring chambers which are maintained at substantially ambient pressure. The resonant vi... | 06/03/2008 |
| 7377172 | Method and system for impact detection of an imaging system A system and method for detecting at least one force, impact, shock, or vibration event on an imaging system. The system comprises a main assembly, a support assembly coupled to the main assembly, and at least one sensor coupled to the imaging system. The at least o... | 05/27/2008 |
| 7360415 | Thermal type air flow meter having semiconductor sensor elements with similar diaphragm sizes A thermal type air flow meter that makes it possible to precisely and easily determine whether a sensor element is a non-defective or a defective by screening is provided. First and second diaphragm sections composed of an electrical insulating film are formed in a ... | 04/22/2008 |
| 7352262 | Insulation of anti-resonance in resonators A cancellation circuit to remove the anti-resonance signal from a resonator. Micro-mechanical and surface and bulk acoustic wave resonators include an anti-resonance in an output signal. This has an undesirable effect on certain types of systems in their function an... | 04/01/2008 |
| 7343805 | Surface acoustic wave pressure sensor A surface acoustic wave pressure sensor includes: a substrate and at least one flexible membrane, suspended over a cavity defined in the thickness of the substrate, the membrane being elastically deformable by a pressure applied by a fluid and being defined between ... | 03/18/2008 |
| 7334481 | Pressure sensor with improved vibrating microassembly and optical detection system A pressure sensor made of a wafer with a pair of parallel silicon layers and a silicon oxide layer there between, comprises a vibrating microassembly formed as a silicon beam, which is arranged in a plane perpendicular to the silicon layers and fastened to a support... | 02/26/2008 |
| 7322248 | Pressure gauge for organic materials A vacuum gauge of the Pirani type for measuring the pressure of vaporized organic or inorganic material used in forming a layer of a device, comprising: an extended filament having a thickness of 5 microns or less and having a temperature coefficient of resistance g... | 01/29/2008 |
| 7316164 | Pressure detection device and manufacturing method of the same A pressure detection device includes a sensing part that is provided at one end portion of the housing to output an electrical signal responsive to an applied pressure, a circuit part that is provided at an other end portion of the housing to process the signal from... | 01/08/2008 |
| 7305884 | In situ monitoring of reactive material using ultrasound The present invention provides a device and method of non-destructively monitoring reactive material through a substrate for changes in material properties that designate the condition of the reactive material during cure and service life. A transducer is placed on ... | 12/11/2007 |
| 7278322 | Semiconductor based pressure sensor The present invention provides a pressure sensor. The pressure sensor comprises a substrate with several support structures attached to the substrate. The pressure sensor further includes a strut structure integrated with a heating element. The strut structure is en... | 10/09/2007 |
| 7280306 | Servo track write at low pressure using pressure insensitive air bearing surface Embodiments of the invention provide a manufacturing method for a disk drive which allows highly accurate recording of servo data without substituting the internal gas of the disk drive, and such a magnetic disk drive and servo track writer. In one embodiment, a dis... | 10/09/2007 |
| 7258014 | Device for measuring pressure A pressure measuring device (2) includes a vibrating ferromagnetic cylinder (4) and mechanically located within a casing (6). A diaphragm (24) is directly connected to the cylinder and forms a pressure measurement surface. Pressure on the... | 08/21/2007 |
| 7246660 | Borehole discontinuities for enhanced power generation An enhanced electrical power generating system. In a described embodiment, an electrical power generating system for use in a subterranean well includes a flow passage formed through a tubular string in the well, a flow region in communication with, and laterally of... | 07/24/2007 |
| 7243547 | MEMS SAW sensor Devices and methods for acoustically measuring temperature and pressure are disclosed. An illustrative SAW sensor can include an electrode structure that transmits and receives surface acoustic waves along a SAW delay line, a temperature sensor for measuring tempera... | 07/17/2007 |
| 7234517 | System and method for sensing load on a downhole tool A system and method for determining load on a downhole tool according to which one or more sensors are embedded in one or more components of the tool or in a material on one or more of the components. The sensors are adapted to sense load on the components. ... | 06/26/2007 |
| 7225679 | Pressure sensor Two sides of a single metal plate are bent to form the structure of a spring terminal having two spring portions. In the spring terminal having such a structure, the two spring portions are different from each other in a natural frequency. For this reason, when exte... | 06/05/2007 |
| 7216813 | Pressure gauge A retrofittable pressure gauge for a spray gun includes a pressure sensor, located in a pressure chamber, a power source and a display unit, all enclosed within a case, a passageway providing fluid communication between the pressure chamber and a pressurised interio... | 05/15/2007 |
| 7198981 | Vacuum sealed surface acoustic wave pressure sensor A vacuum sealed SAW pressure sensor is disclosed herein, which includes a sensing element configured as a SAW device (e.g., SAW resonator or SAW delay line) supported by a thin diaphragm. The substrate material can be implemented as a quartz wafer (i.e., a “baseâ€... | 04/03/2007 |
| 7194909 | Pressure and vibration sensing apparatus A pressure and vibration sensing apparatus designed to sense pressure together with vibration through one apparatus. The pressure and vibration sensing apparatus includes a case adapted to be mounted in a machine generating vibration and having an inlet communicated... | 03/27/2007 |
| 7191658 | Pressure-detecting device and method of manufacturing the same One end of a rod-like pressure-conveying member is disposed in a sensing unit, and the other end extends into and through an insertion hole of an engine. A combustion pressure, to which the other end of the rod-like member is exposed, is conveyed to the sensing unit... | 03/20/2007 |
| 7178402 | Pressure measuring device for vacuum systems A pressure-measuring device is configured for use in vacuum systems, which are used for surface coating or modification of objects and/or substrates in an inner receptacle inside a processing chamber. Elastic elements or portions are fabricated in the inner receptac... | 02/20/2007 |
| 7165455 | Surface acoustic wave sensor methods and systems Sensor systems and methods are disclosed herein, including a sensor chip, upon which at least two surface acoustic wave (SAW) sensing elements are centrally located on a first side (e.g., front side) of the sensor chip. The SAW sensing elements occupy a common area ... | 01/23/2007 |
| 7165298 | Method of making a surface acoustic wave device A surface acoustic wave die system and method are disclosed herein, including a surface acoustic wave sensor comprising one or more surface acoustic wave die disposed and hermetically sealed between a base and a cover. An adhesive is generally for securing one or mo... | 01/23/2007 |
| 7162918 | Method and apparatus for downhole fluid characterization using flexural mechanical resonators The present invention provides a downhole method and apparatus using a flexural mechanical resonator, for example, a tuning fork to provide real-time direct measurements and estimates of the viscosity, density and dielectric constant of formation fluid or filtrate i... | 01/16/2007 |
| 7155980 | Resonating transducer A resonating pressure transducer operable to measure an applied pressure by measuring changes in a resonant frequency is disclosed. The pressure transducer comprises a plurality of diaphragms formed in a wafer of semi-conducting material between two layers, wherein ... | 01/02/2007 |
| 7155038 | Handwriting identification system, writing implement for identifying handwriting and method for identifying handwriting A processing terminal 10 includes a writing implement (ball point pen) 30. The writing implement 30 is provided with a tilt change detecting mechanism for detecting a change in a tilt with respect to a writing implement main body of a lead and a... | 12/26/2006 |
