Optical waveguides – Optical waveguide sensor – Including physical deformation or movement of waveguide
Reexamination Certificate
2007-09-04
2007-09-04
Healy, Brian M. (Department: 2883)
Optical waveguides
Optical waveguide sensor
Including physical deformation or movement of waveguide
C385S012000, C385S088000, C385S092000, C385S094000, C250S227140, C250S231100, C250S229000, C250S231190, C073S705000
Reexamination Certificate
active
11222237
ABSTRACT:
A fiber optics differential pressure transducer (100, 200, 300, 400) containing Bragg networks (118), said transducer being used to measure the differential pressure in a Venturi installed inside a pipe (1), through which a fluid like oil is displaced. The transducer comprises a body (110, 230, 360, 410) of different geometries and a diaphragm (2), at least one Bragg network (118) being attached on each of the surfaces of the same. The diaphragm (2) is placed parallel or transversal to the transducer's body (100, 200, 300, 400). The transducer (200) is isolated from the process fluid by flexible mechanical seals (201) which transmit the pressure up to surfaces of the diaphragm (2). The transducer (300, 400) is provided with two relief microvalves for the purpose of protecting the sensor [diaphragms (2)] in overpressure events.
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Angulo Llerna Roberth Waldo
Arias Vidal Jose Luiz
Barbosa Braga Arthur Martins
da Silva, Jr. Manoel Feliciano
Freitas Ricardo Munoz
Healy Brian M.
Nixon & Vanderhye PC
Petroleo Brasileiro S.A.--Petrobras
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