| Patent Number |
Title Of Patent |
Date Issued |
| 7587938 |
Thermal type flow meter including a secondary heating device to suppress heat transfer |
September 15, 2009 |
| A thermal gas-flow measuring instrument has a first heating resistor placed in the gas to be measured. A temperature sensing resistor is positioned upstream or downstream of the first heating resistor and generates signals relating to the flow rate. Between the first heating resistor |
| 7565836 |
Thermal type flow sensor having a second control circuit to control a second heating resistor ab |
July 28, 2009 |
| A flow rate measuring element of a thermal type flow sensor is placed in the fluid to be measured. The element includes: a first heating resistor for measuring a flow rate; a second heating resistor for heating a support for the first heating resistor; and current control circuits and |
| 7552633 |
Thermal type gas flowmeter |
June 30, 2009 |
| 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 |
