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1. WO1996006338 - DIFFERENTIAL PRESSURE TRANSMITTER

Publication Number WO/1996/006338
Publication Date 29.02.1996
International Application No. PCT/US1995/010610
International Filing Date 18.08.1995
Chapter 2 Demand Filed 19.03.1996
IPC
G01L 9/00 2006.01
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
9Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
G01L 13/02 2006.01
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
13Devices or apparatus for measuring differences of two or more fluid pressure values
02using elastically-deformable members or pistons as sensing elements
G01L 19/00 2006.01
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
19Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
G01L 19/06 2006.01
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
19Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
06Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
CPC
G01L 13/026
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
13Devices or apparatus for measuring differences of two or more fluid pressure values
02using elastically-deformable members or pistons as sensing elements
025using diaphragms
026involving double diaphragm
G01L 19/0046
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
19Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
0007Fluidic connecting means
0046using isolation membranes
G01L 19/0618
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
19Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
06Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
0618Overload protection
G01L 19/0663
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
19Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
06Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
0663Flame protection; Flame barriers
G01L 19/0681
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
19Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
06Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
0681Protection against excessive heat
G01L 19/147
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
19Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
14Housings
147Details about the mounting of the sensor to support or covering means
Applicants
  • THE FOXBORO COMPANY [US/US]; 33 Commercial Street Foxboro, MA 02035, US
Inventors
  • KARAS, Edwin, L.; US
Agents
  • LIEPMANN, W., Hugo ; Lahive & Cockfield 60 State Street Boston, MA 02109, US
  • LAURENTANO, Antony A.; Lahive & Cockfield 60 State Street Boston, MA 02109, US
Priority Data
08/294,09022.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DIFFERENTIAL PRESSURE TRANSMITTER
(FR) TRANSMETTEUR DE PRESSION DIFFERENTIELLE
Abstract
(EN)
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 passageways communicate respectively between first and second pressure openings extending normally horizontally through the body portion, and a transducer mounting element. The mounting element, coupled to the body portion and located above the pressure passageways, mounts a transducer that generates a differential pressure signal. One or a pair of diaphragm elements are configured to form first and second process diaphragms, closing first and second pressure openings. The flange element overlies the diaphragm element and is removably and replaceably secured to the body portion. The pressure transmitter also includes a flame retardation element (13A) that is disposed within at least one of the pressure passageways, and an overrange protection element, integrally arranged with the unitary body portion, that protects the transducer from overrange pressure fluctuations. Special flange plane geometries optimize size and sensitivity of isolation diaphragms.
(FR)
La présente invention concerne un dispositif de transmission de pression pourvu d'un corps monobloc (16), de membranes et des brides distinctes (14), et d'un premier et d'un second canal de pression normalement verticaux disposés dans le corps. Le premier et le second canal de pression communiquent respectivement entre d'une part le premier et le second orifice de prise de pression normalement disposés à l'horizontale au travers du corps monobloc, et d'autre part un élément de montage pour transducteur. Cet élément de montage, couplé au corps et situé au dessus des canaux de pression, supporte un transducteur générant un signal de pression différentielle. Un élément formant membrane, ou une paire de tels éléments est configuré pour servir de première et de seconde membrane, fermant le premier et le second orifice de prise de pression. La bride, disposée au-dessus de l'élément formant membrane, est fixée sur le corps de manière amovible et remplaçable. Le transmetteur de pression comporte également un retardant de flamme (13A) disposé dans l'un au moins des canaux de pression. En outre, un limiteur de plage intégralement disposé dans le corps protège le transducteur contre les fluctuations de pressions dépassant la plage admissible. La taille et la sensibilité des membranes d'isolement sont optimales grâce à la géométrie spécialement conçue des plans de brides.
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