Thermal type air flow meter having a reinforcing structure provided on the base member between the board fixing part and the secondary passage constituting part
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United States of America Patent
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Sep 30, 2014
Issued Date -
N/A
app pub date -
Sep 8, 2011
filing date -
Sep 9, 2010
priority date (Note) -
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Abstract
A thermal type air flow meter that is capable of suppressing deformation of a base member at the time of molding is disclosed, to thereby secure dimension accuracy and reduce an influence of a dimension change on measuring accuracy. The meter includes a housing member placed in an intake passage of an internal combustion engine, and a base member fixed to the housing member and includes a secondary air passage into which part of air passing through the intake passage flows. The base member is a plate-like resin molded component formed of a synthetic resin material and includes a reinforcing structure integrally formed between a board fixing part to which a circuit board is fixed; and a secondary passage constituting part formed at a leading end part of the board fixing part, the reinforcing structure enhancing strength of the base member.
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