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Patent Searching and Data


Matches 201 - 250 out of 3,607

Document Document Title
WO/2001/046665A1
A multivariate semiconductor pressure sensor includes differential pressure sensing elements formed by a polysilicon membrane (14) spanning a sensor cavity (38) formed in a substrate (12). The sensor cavity (38) is in communication with ...  
WO/2001/014841A1
The springs (19 and 25) for biasing the piston (7) of a load transducer (3) act on the piston (7) via a retaining member (21), an adjuster (27) and rod (17). This arrangement reduces the tendency for the piston (7) to deviate from the lo...  
WO/2001/007883A1
The pressure transducer includes a body (240), a diaphragm (112), an insulator (130) with a conductor, a wave washer (170), and a compliant ring (274). The ring (274) has a ratio of thickness to cross sectional width greater than one for...  
WO/2001/001215A1
Apparatus for determining fluid flow through a pressure regulator is disclosed. The pressure regulator is disposed in a fluid flow passage and has a throttling element (32) moveable in the flow passage. A stem (30) is attached to the thr...  
WO/2001/001214A1
Apparatus for performing diagnostics through a regulator is disclosed. The pressure regulator is disposed in a fluid flow passage and has a throttling element (32) moveable in the flow passage. A stem (30) is attached to the throttling e...  
WO/2000/070321A1
A device and method provide for improved error compensation in the measurement of process pressure. The device and method are able to compensate for diaphragm deformation (offset) and varying dielectric constants present in a process fie...  
WO/2000/043118A1
A process for detecting, and monitoring, changes in the properties of a fluidized bed of particulate solids, especially a fluidized bed of particulate catalytic solids at elevated temperature wherein a low molecular weight hydrocarbon is...  
WO/2000/036387A1
The invention relates to a method of producing a micro-electromechanical element. According to said method, a first intermediate layer (4; 14) which is applied to a first main surface of a first semiconductor wafer (2; 26) is structured ...  
WO/2000/034744A1
A process variable transmitter (10) providing a transmitter output representing a process variable (14) sensed by a sensor (18). The transmitter (10) has a filter with a bandwidth which is automatically adjusted based on noise detected i...  
WO/2000/023779A1
Bearing (1) comprising a first part (2) and a second part (3), which is rotatable with respect to the first part (2), for rotation about a bearing axis (8), the first part (2) being provided with a first coil (4), characterised in that t...  
WO/2000/003220A1
The apparatus of the invention includes a sensor header and a sensor cover which are coupled to a prior art diaphragm assembly. The sensor header is provided with two piezoresistive silicon membrane strain gauges. One side of both strain...  
WO/1999/060359A1
A pressure sensor (10) has a sensor chip (14) in a package (13) structured by joining the open side of a stem (11) to the open side of a cap (12). Exerted on both side of a diaphragm (14a) of the sensor chip are pressures transmitted thr...  
WO/1999/056100A1
A process control instrument (10) adapted to provide an output indicative of a parameter of a process fluid is disclosed. The process control instrument is designed to be attachable to a flange (13) having a first passageway (24) filled ...  
WO/1999/050633A1
The invention relates to a differential pressure transducer (100; 600), comprising a measuring chamber which is defined by a housing and divided by a membrane device into a first measuring chamber (111; 611) which can be subjected to a f...  
WO/1999/042802A1
The invention concerns a sensor operating on to the double differential capacitor whereof the mobile armature consists of the sensor deformable membrane (7), comprising a measuring circuit (13) of the capacitor capacitance levels, incorp...  
WO1999032866A3
A capacitive pressure sensor of substantially ceramic material comprises a thick base plate (100), a front plate (140) having the same thickness as the base plate and a movable diaphragm (120) located between the front plate and the base...  
WO/1999/032866A2
A capacitive pressure sensor of substantially ceramic material comprises a thick base plate (100), a front plate (140) having the same thickness as the base plate and a movable diaphragm (120) located between the front plate and the base...  
WO/1999/028720A1
A capacitive pressure transducer (110) includes a conductive diaphragm positioned between pneumatically separated chambers. The diaphragm is fixed and sealingly coupled at its periphery to the peripheral rim (116) of a concave body membe...  
WO/1999/026048A1
The invention relates to a micromechanical differential pressure sensor device for measuring a pressure difference between two interspaced areas or media in which two absolute pressure measuring devices (9a, 9b) are integrated in a monol...  
WO/1999/024140A1
A differential pressure monitor (50) for measuring the pressure at a plurality of heights in a filter bed (38) is provided. A preferred embodiment of the monitor (50) includes an elongated body (70), a plurality of pressure sensors (56) ...  
WO/1999/017088A1
The invention relates to a method for filling the measuring chamber (4, 13, 27) of a pressure differential measuring transducer with pressure transmission liquid via a filling duct (27). According to the inventive method, a filling bar (...  
WO/1999/012013A1
The invention relates to a separating membrane system for a pressure transducer, comprising an inner body (1) with a structured area (3) with annular, wave crest-shaped peaks (4, 4') and wave hollow-shaped troughs (6), a separating membr...  
WO/1998/038484A1
The invention relates to a pressure differential measuring transducer comprising measuring membranes located next to each other on one side of a membrane disk and a common fluid area allocated thereto. In order to obtain an electrical me...  
WO/1998/015808A1
The invention concerns a cell (28) for converting differential pressure into an electric signal comprising: two chambers (38, 40) filled with an incompressible fluid each delimited by a membrane (32, 34) capable of being deformed by the ...  
WO/1998/002205A1
This invention is an improved fluid management system (Fig. 1) for irrigation of a body cavity and in particular for use in arthroscopic surgery having a pressurized fluid circuit (17) for supplying irrigation fluid, and a vacuum fluid c...  
WO/1998/001731A1
A pressure transducer that includes at least two sensors having substantially similar or substantially indentical error characteristics, wherein each sensor is arranged to be subjected to an applied pressure and the outputs of the sensor...  
WO/1997/048974A1
A differential pressure sensor is attached to a process via a high and a low pressure impulse line. An absolute pressure sensor is also attached to each impulse line. To determine if an impulse line is blocked, a noise signal is acquired...  
WO1997021984A3  
WO/1997/022855A1
An instrument installation system is provided which uses interchangeable hardware components and improved methods to connect differential pressure transducers to process piping. The system is designed to permit the instrument to be close...  
WO/1997/021984A2
A system for improving fluid pressure measurement in a control valve (100) includes placing a flow conditioner (12, 52) adajcent to and upstream from averaging channels (42, 82) located at the inlet (106) and outlet (116) of the control ...  
WO/1997/004295A1
Dynamometric detector device for bearings, with a strain transmitter means fitted integral with a race and supporting a sensor, characterized in that the strain transmitter and sensor support means is comprised of the armature (7) of the...  
WO/1996/041141A1
A differential pressure transducer includes a pair of interior chambers (12, 14) separated by supported, nominally planar electrically conductive diaphragm (16). A magnetic assembly is positioned on at least one chamber wall opposite an ...  
WO/1996/037764A1
A selectively pressured housing apparatus comprising a body, a wall member, an aperture, and a mounting seat. The body has a chamber therein extending along a first axis, is open at a first axial end and a second axial end, and has a por...  
WO/1996/027123A1
First capacitance pressure sensor (70A, B) has a fusion bonded single crystal structure (sapphire with cavity). Second one (70A, B) has an elongated and thick single crystal structure. Third one (70A, B) uses the electric field emanating...  
WO/1996/019371A1
Device for eliminating sudden pressure changes in an air-conditioned or ventilated vehicle. The vehicle comprises an inlet (3) for external air and an outlet (5) for internal air, the inlet being connected to a suction tube (2) drawing t...  
WO1996006338A3  
WO/1996/006338A2
A pressure transmitter apparatus having a unitary body portion (16), separate diaphragms and flange elements (14) and disposed within the body, a first and second normally vertical pressure passages. The first and second pressure passage...  
WO/1996/001414A1
A media-isolated differential pressure sensor apparatus and corresponding method combines a first signal (207, 209) provided by a first pressure sensor (101), indicative of a difference between a first pressure and second pressure applie...  
WO/1995/024625A1
A fool-proof valve battery useful as a connecting module for a differential pressure measurement transducer has first and second inlet connections (1, 2) for connecting to a differential pressure source (+p, -p), first and second outlet ...  
WO/1995/008759A1
A transmitter (10) provides an output indicative of pressure of process fluid. The transmitter (10) has a first body (14) with a passageway (32) filled with isolation fluid extending from a first port to a pressure sensor (16). A second ...  
WO/1994/021992A1
The invention relates to a pressure difference measurement converter with an inner housing divided into two parts transversely to its longitudinal axis, between the two housing sections of which is clamped a central diaphragm bearing a p...  
WO/1994/017383A1
A pressure sensor has a substrate (21) and a layer (25) which defines together with the substrate a pressure sensor cavity (24). The layer has a diaphragm-like area (26) upon which an outer pressure may be applied. In order to create a m...  
WO/1994/005988A1
A pedestal mount capacitive pressure sensor (10) is supported in a housing (11) and used to sense fluid pressures to provide air pressure data relating to the performance of air vehicles. The capacitive sensor uses a thick base plate (40...  
WO1993024818A3  
WO/1993/024818A2
A two-wire transmitter includes a pressure sensor (5; 160) comprising first (11; R¿9?, R¿10?) and second (13; R¿11?, R¿12?) sensing means each having an impedance value which varies with pressure being measured and with a predetermin...  
WO/1993/022643A1
A method and apparatus for measuring differences between forces, pressures, and combinations thereof. One or more force or pressure deformable members, preferably metal bellows, are internally connected by rigid linkage which is in turn ...  
WO/1993/021506A1
A transmitter (8) with a flame arresting header (16) senses a pressure of a process fluid with a diaphragm (44) which is sealed to the header. The diaphragm (44) transfers the pressure of the process fluid acting on an outer surface of t...  
WO/1993/017313A1
The invention relates to a pressure difference sensor with a semiconductor measuring diaphragm which is clamped between two bearers of insulating material to form an inner chamber; each of the bearers is fitted with a flat electrode on t...  
WO/1993/008479A1
A two wire transmitter (12) responsive to a pressure differential sensor (30) includes a fixed module (28) and a removable module (26). The fixed module (28) is adapted for connection to an analog removable module (26) having a compensat...  
WO/1992/017757A1
A pressure sensing transmitter (10) is provided that has high overpressure protection. The transmitter (10) includes a housing (12) having a first cell(14), a second cell (16), a sensing chamber (18), first and second pressure signal rec...  

Matches 201 - 250 out of 3,607