Thermal type gas flowmeter

Details Thermal type gas flowmeter Thermal type gas flowmeter

2007-07-27

2009-06-30

Patel, Harshad (Department: 2855)

Measuring and testing

Volume or rate of flow

Thermal type

C073S204270

Reexamination Certificate

active

07552633

ABSTRACT:
A thermal type gas flowmeter comprising a sensor element which, in turn, comprises at least one first heating resistor, two or more resistors in fluid and a second heating resistor which is disposed between the first heating resistor and a housing supporting the sensor element. The first and second heating resistors are electrically independent from each other. A temperature sensing unit is provided between the first and second heating resistors. A temperature of the first or second heating resistor is controlled by a temperature sensed by the temperature sensing unit.

REFERENCES:
patent: 4138878 (1979-02-01), Holmes et al.
patent: 4351182 (1982-09-01), Schmidberger
patent: 4587842 (1986-05-01), Handtmann
patent: 4884443 (1989-12-01), Lee et al.
patent: 5003822 (1991-04-01), Joshi
patent: 5311772 (1994-05-01), Martinson et al.
patent: 5635635 (1997-06-01), Tsukada et al.
patent: 6588268 (2003-07-01), Yamagishi et al.
patent: 7213455 (2007-05-01), Kobayashi et al.
patent: 2007/0220968 (2007-09-01), Tokuyasu et al.
patent: 2007/0251315 (2007-11-01), Sukegawa et al.
patent: 40 12 081 (1991-10-01), None
patent: 59-136620 (1984-08-01), None
European Search Report dated Sep. 24, 2007 (four (4) pages).

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