Hot wire gas flow sensor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 27, 2003
Grant Date -
N/A
app pub date -
Oct 16, 2000
filing date -
Oct 16, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An improved hot wire gas flow sensor is disclosed having a housing with a passageway in series with a passageway through which the gas flow is measured. The housing includes both a hot wire and cold wire disposed within the passageway. A current circuit maintains the temperature differential between the hot wire and cold wire preferably in the range of 30.degree. C. to 100.degree. C. by varying the current flow through the hot wire. Current limiting circuitry is then utilized to limit the current flow through the hot wire and thus the temperature of the hot wire in order to prevent possible combustion of the gas in the passageway. Additionally, a current augmenting circuit augments the current flow through the hot wire for a limited period of time following the electrical energization of the flow sensor in order to provide rapid heat up of the hot wire in the hot wire sensor. Improvements are also disclosed for fluidly sealing the electrical leads to both the hot wire and cold wire to prevent gas leakage from the sensor.
First Claim
Family
International Classification(s)
- No Non-US Classification to display
Cited Art Landscape
Patent Citation Ranking
- No Patent Citation Ranking to display
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully