Measuring and testing – Volume or rate of flow – Thermal type
Reexamination Certificate
2006-06-20
2006-06-20
Lefkowitz, Edward (Department: 2855)
Measuring and testing
Volume or rate of flow
Thermal type
Reexamination Certificate
active
07062964
ABSTRACT:
A heating resistor type flow measuring device comprising a housing having a support part provided between a frame body and a connector and connected to the mounting part of a fluid passage, a flow rate detection element held on the frame body side of the housing, and an electronic circuit held on the housing and connected electrically to the flow rate detection element and the connector, wherein the electronic circuit is held on the frame body side of the housing and positioned in the fluid passage, a member with the rigidity higher than the material of the main structural member of the housing is formed integrally with the support part, the housing is fixed to the fluid passage through the member with high rigidity. A metal plate is inserted into the support part so as to increase rigidity. Further, a distance is provided between the support part and a metal plate forming a route for conducting the heat transferred to the metal base fixing an electronic circuit substrate by a plastic mold so as to form a structure obstructing a heat transfer, or a clearance is provided in a portion spaced by the plastic mold between the support part and the metal base so as to form a structure obstructing a heat transfer.
REFERENCES:
patent: 6012432 (2000-01-01), Igarashi et al.
patent: 3-233168 (1991-10-01), None
patent: 9-170940 (1997-06-01), None
patent: 11-014423 (1999-01-01), None
patent: 2000-2572 (2000-01-01), None
Igarashi Shinya
Kikawa Hiromu
Kozawa Masayuki
Saito Naoki
Takasago Akira
Crowell & Moring LLP
Hitachi , Ltd.
Hitachi Car Engineering Co. Ltd.
Lefkowitz Edward
Mack Corey D.
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