Class 73/746 - Resistive

Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein the displacement of the movable wall
No. of patents: 31
Last issue date: 08/28/2007

Browse patents
Browse applications

Number	Title	Issue Date
7261006	Blast pressure gauge Blast pressure gauges and methods for detecting blast pressure during a blast test. The gauges operate independently of power sources, are portable, and are used in harsh environments including test ranges. Each embodiment is constructed to detect blast pressures as...	08/28/2007
7249516	Method of operating a resistive heat-loss pressure sensor In a resistively heated heat-loss pressure gauge, electrical current is switched between a sensing element and a compensating element at different duty cycles. As a result, the sensing element is heated relative to the compensating element. A fixed resistance is pla...	07/31/2007
7244926	Microresonator-based high-performance high-pressure sensor and system An optically-powered integrated microstructure pressure sensing system for sensing pressure within a cavity. the pressure sensing system comprises a pressure sensor having an optical resonant structure subject to the pressure within the cavity and having physical pr...	07/17/2007
7086272	Calibration method for digital air pressure gauge The digital air pressure gauge includes an error correction lookup table database stored within a memory device within the gauge. The database includes reference air pressure values and associated measured air pressure values, where the reference air pressure values...	08/08/2006
6978679	Hydraulic pressure sensor A hydraulic pressure sensor for measuring the pressure in a hydraulic pressure chamber 1. A reservoir housing 9 is connected to the pressure chamber, and the interior of the housing is divided by a slideable partition 13 which defines a reservoi...	12/27/2005
6935184	Pressure transducer capable of detecting internal leakage of external media A pressure transducer capable of detecting leakage of media into the pressure transducer. The pressure transducer comprises a spacer having first and second ends. A first header assembly containing a first pressure sensor for measuring a pressure of the media, is se...	08/30/2005
6895822	Apparatus and method for interconnecting leads in a high temperature pressure transducer A novel method for interconnecting leads in a high pressure transducer without the use of solder employs a ceramic disc containing a number of through holes. Each hole has a tube inserted therein, which tubes are connected to the disc by brazing or a high temperatur...	05/24/2005
6886929	Techniques for improving pressure sensor shock robustness in fluid containment devices Techniques are disclosed for improving pressure sensor shock robustness in fluid containment devices by providing a mechanical filter configured to prevent high-frequency pressure shocks from damaging the pressure sensor. One approach includes a body of elastomeric ...	05/03/2005
6224094	Force sensor for seat occupant weight sensor A force sensor for sensing the weight of a vehicle seat occupant for a vehicle's occupant protection system has a pressure sensor responsive to hydraulic pressure resulting from axial force applied to the force sensor. A constant force spring in the form ...	05/01/2001
6062087	Heat and pressure sensor apparatus employing a piston in direct contact with the measured fluid Apparatus is provided for sensing the pressure and temperature of fluid within a cavity of a block, such as hot plastic that flows into a mold cavity. The apparatus includes a piston (30) lying closely but slideably within a bore that extends from the cav...	05/16/2000
6016097	Motion transducer A motion transducer having a user moveable plunger which compresses a spring for generating a force proportional to plunger displacement and applying the generated force to an actuator telescoped onto the plunger. The actuator has an elastomeric pad on th...	01/18/2000
5836886	Catheter having a sensor A catheter that is guided into an intra-corporeal passageway is set forth. A catheter tube accommodates an element having a piston for detecting a pressure in the intra-corporeal passageway. Silicone gel is accommodated in the catheter tube to transmit th...	11/17/1998
5774056	Gauge for monitoring air filters An indicating device includes a housing that is separated into two sub-chambers by a flexible diaphragm. A indicating member is carried by the diaphragm so that the diaphragm and the indicating member move, within the housing, responsively to changes in t...	06/30/1998
5644285	Pressure transducer with media isolation A pressure sensor die is provided with a flexible membrane and a plunger which combine to amplify a low pressure signal while also providing media isolation between a fluid being measured and the internal components of a pressure sensor. One embodiment of...	07/01/1997
5452613	Wide range vacuum gauge A device for determining a pressure of gas in an evacuated chamber including a cylinder positioned in fluid communication with the evacuated chamber with the cylinder forming a compressed gas chamber, a reciprocating piston received within the cylinder an...	09/26/1995
5284061	Integral pressure sensor An integral pressure sensor for a pressurized vessel, including a housing, a core element, a seal and a spring. This combination is disposed on the interior of the pressurized vessel. The core element is preferably a magnetic element or a steel ball which...	02/08/1994
5168751	Digital tire pressure gauge A digital tire pressure gauge comprises a pressure measuring head to introduce thereinto the tire air. The pressure measuring head extends axially to form a tubular body in which a pressure bearing rod encased by a coil spring is received. The pressure be...	12/08/1992
4982607	Composite cylinder for a mini oil pressure transducer An improved pressure transducer to measure and indicate fluid pressure levels including a housing in which a piston assembly is movable in response to pressure changes, the housing being of a composite material of metal and plastic and having grooves ther...	01/08/1991
4805449	Apparatus and method for measuring differential pressure while drilling An apparatus and method for measuring differential pressure of mud internal a drill string and mud in a borehole annulus is disclosed. The apparatus typically comprises: a drill collar having a pressure balancing piston in hydraulic contact with the boreh...	02/21/1989
4805460	Oil pressure transducer A pressure transducer to measure and indicate fluid pressure levels including a housing in which a diaphragm and piston assembly is movable in response to pressure changes, the piston having a portion extending therefrom to engage a switch contact thereby...	02/21/1989
4770050	Force or pressure measuring device Force or pressure measuring device. Between a support member and a force or pressure introduction member elastomeric material is provided which strongly adheres to the two members and is in contact with at least one pressure sensor. With a preferred embod...	09/13/1988
4728920	Pressure transducer A fluid pressure transducer having a hollow enclosure with an elongated tubular guide supported therein around which a tubular piston moves in response to fluid pressure forces acting on one piston end. A spirally-wound wire resistance coil on the guide i...	03/01/1988
4640295	Tocodynamometer A tocodynamometer for measuring intra-amniotic pressure through the abdominal wall of obstetric patients, including a force transducer resiliently mounted in a housing, a precompressed coil spring between the housing and an outer backplate, and an attachm...	02/03/1987
4512199	Transducer A transducer for establishing an output voltage proportional to an input fluid pressure supplied thereto. The transducer has a resistor with a voltage selector movable in electrical contacting engagement therewith to establish the output voltage. A piston...	04/23/1985
4365406	Pressure transducer and method of making same A hydraulic pressure transducer comprises a cylindrical housing having a plurality of circumferential inwardly and outwardly directed ribs which axially position and retain coaxially aligned operative components within the transducer. These components inc...	12/28/1982
4299129	Pressure measuring device A pressure measuring device for measuring absolute or differential pressure has a hollow carrier, with a deformable measuring bar extending across the opening in the carrier. A transducer is fixed on the bar and converts deformation of the bar to electric...	11/10/1981
4279162	Pressure transducer A hydraulic pressure transducer comprises a cylindrical housing having a plurality of circumferential inwardly and outwardly directed ribs which axially position and retain coaxially aligned operative components within the transducer. These components inc...	07/21/1981
4261207	Fluid pressure-sensing device A device for sensing and/or measuring fluid pressure which includes a pressure-sensing tube elongating as a function of fluid pressure therein, a non-expanding member connected to the tube and extending in generally parallel relation thereto and terminati...	04/14/1981
4106349	Transducer structures for high pressure application A high pressure transducer includes a first disk member having positioned on a surface, a square piezoresistive bridge array. Located above and coaxial with the first disk member is a second member of a substantially greater thickness. The second member h...	08/15/1978
4061034	Fluid pressure sensing device A device operable in response to an input fluid force includes a housing having an inner surface and a fluid pressure responsive member carried within the housing and having a surface that abuts the inner surface of the housing. The surfaces are curved an...	12/06/1977
3979959	Appliance for measuring pressure This invention concerns an appliance for measuring pressures, particularly those above 5,000 bars. This appliance comprises in combination, a manometric gauge and a dynamometric ring equipped with stress gauges, the section of the ring being such that its...	09/14/1976

PatentStorm

Bizarre Patents

PatentStorm News

Class 73/746 - Resistive