Gas separation – Combined or convertible – In environmental air enclosure
Reexamination Certificate
2005-08-12
2009-02-24
Hopkins, Robert A (Department: 1797)
Gas separation
Combined or convertible
In environmental air enclosure
C096S224000, C096S421000, C454S238000, C454S239000
Reexamination Certificate
active
07494524
ABSTRACT:
An apparatus for maintaining a desired air pressure inside a home includes a differential pressure switch/gage having a first port and a second port. The first port is adaptable for sensing a first pressure inside the home; the second port is adaptable for sensing a second pressure outside the home. The differential pressure switch/gage is adaptable for producing a signal in response to a difference between the first pressure and the second pressure. A motorized damper is in signal communication with the differential pressure switch/gage and is operable to control entry of air into the home in response to the signal. A method of maintaining a desired air pressure inside a home comprises sensing a first pressure inside the home, sensing a second pressure outside the home, and introducing air into the home through a controlled opening if said second pressure exceeds said first pressure by a specified amount.
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Cox Smith Matthews Incorporated
Hopkins Robert A
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