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Class 73/726 - Strain gauge


Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein the stress and/or strain in
No. of patents: 251
Last issue date: 03/12/2013


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NumberTitleIssue Date
8393223Pressure sensor with resistance strain gages
A pressure sensor micromachined by using microelectronics technologies includes a cavity hermetically sealed on one side by a silicon substrate and on the other side by a diaphragm that is configured to be formed under the effect of the pressure outside the cavity. ...
03/12/2013
8375798External pressure measuring device
An external pressure measuring device having a base and a tubing system bent with various radii. Pressure inside the bent tubing causes the tubing to move in such a way that can be measured and can provide an indication of internal pressure. ...
02/19/2013
8291769Multipurpose transducer for an appliance using water
A multipurpose transducer for an appliance using water, like a washing machine, a dishwasher or a hot-water tank converts physical parameters like water temperature, cleanness and pressure in said appliance into electric signals. It is provided with a temperature tr...
10/23/2012
8191426Low TCR nanocomposite strain gages
A high temperature thin film strain gage sensor capable of functioning at temperatures above 1400° C. The sensor contains a substrate, a nanocomposite film comprised of an indium tin oxide alloy, zinc oxide doped with alumina or other oxide semiconductor and a refr...
06/05/2012
7861596Method and system for detecting air pressure neutrality in air containment zones
An airflow detecting system includes a tubular structure having an inner surface defining an interior of the tubular structure, one open end and an opposite open end. The tubular structure is configured to receive and expel air through both the one end and the oppos...
01/04/2011
7856886Pressure sensor having a diaphragm having a pressure-receiving portion receiving a pressure and a thick portion adjacent to the pressure-receiving portion
A pressure sensor includes: a diaphragm having a pressure-receiving portion receiving a pressure and a thick portion adjacent to the pressure-receiving portion; and a pressure sensitive element having a first and a second ends facing each other. The pressure sensiti...
12/28/2010
7644623Semiconductor sensor for measuring a physical quantity and method of manufacturing the same
A semiconductor pressure sensing apparatus includes a metallic stem having a diaphragm and a semiconductor sensor bonded to the diaphragm. The semiconductor sensor includes a gauge section and first and second bonding pads. The gauge section is configured to be defo...
01/12/2010
7559247Pressure sensor with reduced size strain gauge mounting structure and manufacturing method of the same
A pressure sensor for detecting pressure includes: a metallic diaphragm for receiving the pressure; four strain gauges providing a Wheatstone bridge, wherein each strain gauge outputs an electric signal corresponding to deformation of the diaphragm when the diaphrag...
07/14/2009
7434471Pressure measurement transducer with protective device
A pressure measurement device with protection from long-term loads and pressure shocks. The novel device includes a diaphragm adapted to deform in response to a pressure applied thereto, and a retractable support adapted to support the diaphragm during periods of no...
10/14/2008
7412892Method of making pressure transducer and apparatus
A method for making a pressure transducer comprising: forming a recess in a diaphragm, the diaphragm having a thinned region that deflects responsively to pressure being applied thereto; depositing a glass frit in the recess; embedding a plurality of strain gages in...
08/19/2008
7350418Fluid supply assembly with measuring guide
A fluid supply assembly having a measuring guide comprising a fluid container, a lid, and a measuring guide. A method of measuring fluid components in a fluid supply assembly is also described. ...
04/01/2008
7347099Pressure 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
7343810Pressure sensor and manufacturing method therefor
A pressure sensor is composed of a pressure housing having a pressure chamber inside and a pressure sensitive element arranged in the pressure chamber, and a joint housing having a fluid passage for leading fluid into the pressure housing, wherein the pressure housi...
03/18/2008
7331102Apparatus for detecting an amount of strain and method for manufacturing same
An apparatus for detecting an amount of strain comprises a strain generating part, an electrical insulating layer and sensing elements. The strain generating part is a member to which strain is to be applied. The electrical insulating layer is formed on the strain g...
02/19/2008
7318353Method and apparatus for a product displacement sensing device
A displacement sensing device transduces deflection of a body disposed around a conduit into complementary signals indicative of the amount of displacement experienced by the conduit. The displacement sensing device includes a cuff and a sensor disposed on an outer ...
01/15/2008
7316164Pressure 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
7313970Diaphragm-type pressure sensing apparatus
A diaphragm-type pressure sensing apparatus includes a pressure sensor having a diaphragm for converting pressure into an electrical signal, a circuit board for processing the electrical signal, and a housing in which the pressure sensor and the circuit board are se...
01/01/2008
7290675Method of manufacturing a tank of thermoplastic material including a portion in relief for mounting an attachment, and a tank manufactured thereby
A method of making a tank out of blown, thermoformed, or rotomolded thermoplastic material, the method comprising the following steps: making a portion in relief on the inside of the tank, said portion in relief enabling an attachm...
11/06/2007
7290453Composite MEMS pressure sensor configuration
A pressure sensor assembly comprised of a single and dual layer diaphragm with integrated force sensing flexure, such as a cantilever beam. Strain gages are positioned on the force sensing beam. The pressure forces the diaphragm to deflect. The deflection is constra...
11/06/2007
7284444Hermetically sealed displacement sensor apparatus
A hermetically sealed displacement sensor has strain gauges placed on thin flexible triangular shaped beams of a load beam cell. The strain gauges are enclosed in a hermetically sealed cavity which cavity is sealed by means of a cover plate placed over the load beam...
10/23/2007
7270010System and method for pressure measurement
A pressure measurement system may provide ready manufacturing, reliable operation, and/or enhanced performance by using a circuit board housing. In particular implementations, a pressure measurement system includes a pressure inlet joint, a pressure detecting compon...
09/18/2007
7263893Fluid supply assembly with measuring guide
A fluid supply assembly having a measuring guide comprising a fluid container, a lid, and a measuring guide. A method of measuring fluid components in a fluid supply assembly is also described. ...
09/04/2007
7263895Strain detector and method of manufacturing the same
A fluid pressure sensor (1) for measuring the pressure of a fluid comprises a diaphragm portion (12) which is a strain generating body, a silicon oxide film (21) as an insulating film, and a strain gauge (20) made of crystalline silicon, ...
09/04/2007
7260994Low cost high-pressure sensor
A pressure sensing apparatus including a thin disc of a metal having a ceramic material layer and piezoresistive elements formed thereon. A surface of the disc is bonded to a diaphragm assembly on a pressure port base constructed of a low cost metal. The bonding pro...
08/28/2007
7254990Machine fluid sensor
A sensor for sensing one or more properties of a vehicle fluid has a tuning fork resonator adapted to contact the fluid. The tuning fork resonator comprises two tines and is operable to oscillate so that the two tines move in opposite phase at a frequency of less th...
08/14/2007
7243552Pressure sensor assembly
A silicon-based high pressure sensor module incorporates a low temperature cofired ceramic (LTCC) substrate. The LTCC substrate can withstand high pressures. A bossed container filled with oil is mounted on the substrate and houses a sensor cell. The top surface of ...
07/17/2007
7228744Pressure transducer for gaseous hydrogen environment
A silicon-based hydrogen pressure sensor module incorporates a low temperature cofired ceramic (LTCC) substrate that shields the cavity formed by the silicon membrane and cell body from hydrogen permeation. A bossed container filled with an oil material is mounted o...
06/12/2007
7225678Housing structure of a pressure sensor apparatus and method of producing the same
A pressure sensor apparatus includes a reception container for receiving a pressure sensor, the reception container having an opening on one side. Furthermore, the pressure sensor apparatus includes a protective membrane closing the opening, a pressure sensor arrang...
06/05/2007
7223624Micromechanical device with thinned cantilever structure and related methods
In one aspect, a microelectromechanical device and method of producing the device includes an accelerometer with a thinned flexure structure. In another embodiment, the device and method of producing the device includes an accelerometer and a pressure sensor integra...
05/29/2007
7216498Method and apparatus for determining supercritical pressure in a heat exchanger
A method and apparatus to determine the pressure of a supercritical refrigerant within a heat exchanger of a transcritical vapor compression system. A plurality of measurements, e.g., temperature, are obtained at spaced locations on the heat exchanger and the locati...
05/15/2007
7217244Pressure pulse wave sensor and pressure-pulse-wave analyzing apparatus
A pressure pulse wave sensor for being worn on a surface of a body of a living subject so as to detect a pressure pulse wave from the subject, the sensor including a plurality of elongate flexible piezoelectric sheets each of which is formed of a piezoelectric resin...
05/15/2007
7210362Diaphragm type load detection sensor, load detection unit and electronic scale using same
Disclosed is a diaphragm type load detection sensor, comprising: a mounting portion attached to a installation plate; a strain generation portion provided on the mounting portion and having a load applied portion formed at the center thereof to which a load to be de...
05/01/2007
7210357Pressure sensor and manufacturing method of the same
A pressure sensor includes a sensor chip having a pressure receiving surface formed on one surface of the sensor chip, a first case having one end portion at which the sensor chip is provided, a second case attached to the one end portion of the first case to cover ...
05/01/2007
7207226Semiconductor pressure sensor
In an ECU in which a sensor IC and various engine control devices are mounted on a board in a case, the sensor IC has a pressure sensor element covered with mold resin having a pressure introduction hole extending outward from the pressure sensor element so as to op...
04/24/2007
7191662Polymer-based sensor apparatus and method
A strain sensor (10) includes a flexible substrate (11) having one or more polymer-based resistive elements (12) at least partially conformably disposed thereon. Two or more conductive leads (13, 14) are electrically coupled to the resist...
03/20/2007
7181831Method of manufacturing strain sensor
A strain sensor comprising a metal substrate, a first electrode provided on the metal substrate, a glass layer formed on the first electrode, and a second electrode and a strain detecting resistor provided on the glass layer. In the strain sensor, the insulation res...
02/27/2007
7183620Moisture resistant differential pressure sensors
A differential pressure sensor has a semiconductor wafer having a top and bottom surface. The top surface of the wafer has a central active area containing piezoresistive elements. These elements are passivated and covered with a layer of silicon dioxide. Each eleme...
02/27/2007
7178330Pressure detecting apparatus having solenoid valve and pressure sensor
A secondary air pressure detecting apparatus includes a solenoid valve and a pressure sensor. The solenoid valve defines a secondary air passage that introduces secondary air from the air pump into the exhaust system of an engine. The solenoid valve opens and closes...
02/20/2007
7178404Pressure gauge for measuring pressure in liquid and gasseous media
A pressure gauge comprising a thread tube, a printed circuit board carrying a pressure sensing device installed on one side of the printed circuit board and tightly packed with silicon rubber to form the end cover of the thread tube. When used for testing the pressu...
02/20/2007
7151431Resistor element, stress sensor and method for manufacturing them
A stress sensor in which the direction and magnitude of a stress being applied to a post (6) bonded to or integrated with the surface of an insulating board (3) can be grasped from variation in the resistance of a plurality of resistor elements (8
12/19/2006
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