Measuring and testing – Volume or rate of flow – Thermal type
Patent
1988-12-07
1991-01-15
Cuchlinski, Jr., William A.
Measuring and testing
Volume or rate of flow
Thermal type
7320425, 374 54, G01F 168
Patent
active
049844601
ABSTRACT:
A mass flowmeter comprising heat sensitive coils mounted at an upstream position and a downstream position of a conduit through which a fluid flows. The heat sensitive coils have a resistance variable with the fluid temperature, and are each included in a constant temperature difference circuit. This circuit further includes an ambient temperature detecting resistor having approximately the same characteristics as the heat sensitive coils, and a temperature difference setting resistor having approximately zero temperature coefficient. These resistors are connected in series to the heat sensitive coil. The circuits are connected to a control unit which controls differences between temperatures of the heat sensitive coils and ambient temperature to be approximately the same as a value set by the temperature difference setting resistor. A mass flow rate of the fluid through the conduit being measured by detecting a difference in amounts of energy supplied to the heat sensitive coils.
REFERENCES:
patent: 2552017 (1951-05-01), Schwartz et al.
patent: 3020760 (1962-02-01), Schnoll
patent: 3438254 (1969-04-01), Seeley
patent: 3968685 (1976-07-01), MacHattie
patent: 4135396 (1979-01-01), Stanke et al.
patent: 4297881 (1981-11-01), Sasayama et al.
patent: 4464932 (1984-08-01), Ewing et al.
patent: 4487063 (1984-12-01), Hopper
patent: 4519246 (1985-05-01), Hartemink
patent: 4581929 (1986-04-01), Sugiura
patent: 4672847 (1987-06-01), Uchiyawa et al.
Cuchlinski Jr. William A.
Greigg Edwin E.
Gutierrez Diego F. F.
Lintec Co., Ltd.
LandOfFree
Mass flowmeter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mass flowmeter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mass flowmeter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-48439