Measuring and testing – Volume or rate of flow – Thermal type
Reexamination Certificate
2005-05-17
2005-05-17
Patel, Harshad (Department: 2855)
Measuring and testing
Volume or rate of flow
Thermal type
C073S204220, C073S861740
Reexamination Certificate
active
06892571
ABSTRACT:
A sensor for measuring a flow speed of a fluid medium includes a housing with a carrier membrane disposed in the housing and being essentially in a form of a vane having a circumference and at least one edge region. Holding elements are arranged over a portion of the circumference connecting the vane to the housing so that only the at least one edge region of the carrier membrane is subjected to mechanical stress caused by the housing. An electrically conductive track with feed lines is installed on the carrier membrane in a region of a neutral fiber for the carrier membrane which does not experience a mechanical strain when the carrier membrane is bent. The electrically conductive track is adapted for being heated relative to the environment by an electrical current flowing through the electrically conductive track.
REFERENCES:
patent: 4651564 (1987-03-01), Johnson et al.
patent: 4912974 (1990-04-01), Inada et al.
patent: WO 01 18500 (2001-03-01), None
T. Matsura et al., “Deformation Control of Microbridges For Flow Sensors” Sensors and Actuators A, Bd. 60, No. 1-3, May 1, 1997, pp. 197-201.
Dittmann Dirk
Schlote-Holubek Klaus
Schomburg Werner
Forschungszentrum Karlsrue GmbH
Kinberg Robert
Patel Harshad
Venable LLP
Wiseman Thomas G.
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