Method and apparatus for regulating air supplied to a gas mask
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 6, 1990
Grant Date -
N/A
app pub date -
Mar 31, 1989
filing date -
Oct 5, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a method by which the amount of air supplied to a gas mask is kept essentially constant by using the fan motor (1) as a sensor, with the aid of which its power is regulated. The electronic regulation circuit of the invention keeps the air amount constant by regulating the pulse width ration of the voltage (U1) operating over the motor. The light emitting diode (LED) connected to the control circuit detects when the fan motor is unable to produce the selected amount of air. In order to prevent deep discharge of the battery, the voltage supervising circuit (6) interrupts the current supply to the device when the supplied voltage (SJ) drops below the set limit value.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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