Fluid handling – Ambient condition change responsive – Atmospheric
Patent
1996-12-06
1998-08-04
Perensic, Denise L.
Fluid handling
Ambient condition change responsive
Atmospheric
7386175, 454369, F16K 1738
Patent
active
057879192
ABSTRACT:
A pressure differential indicating apparatus has a wall duct with first and second ends, first and second flange like mounting plates respectively disposed around and attached to the first and second ends, a low speed airflow indicator mounted at one of the ends on a side of the mounting plate opposite that to which the wall duct is mounted, and a fire damper with a closable fire damping door that is disposed in the duct. The fire damper includes an actuation device for keeping the door open until the actuation device is caused to close the door. One particular embodiment of the actuation apparatus has a spring counter loaded solenoid that keeps the door open when energized and a spring operably connected to the solenoid so as to close the door when the solenoid is de-energized. An alarm system may be used for detecting smoke/fire and controlling a voltage supply line connected to the solenoid may be used to energize the solenoid and includes power cutoff apparatus for cutting off voltage to the supply line to de-energize the solenoid and close the fire damping door that is disposed in the duct.
REFERENCES:
patent: 622851 (1899-03-01), Hatch
patent: 960917 (1910-06-01), Henderson
patent: 988496 (1911-04-01), Obermann
patent: 2034373 (1936-03-01), Bilde
patent: 2072369 (1937-03-01), Jenson
patent: 2605639 (1952-08-01), Gentile, Jr.
patent: 2647402 (1953-08-01), Ibbott
patent: 3282103 (1966-11-01), Steele
patent: 3463003 (1969-08-01), Pierman et al.
patent: 3564917 (1971-02-01), Cronin et al.
patent: 3640307 (1972-02-01), Drzala
patent: 3826136 (1974-07-01), Chang
patent: 4084744 (1978-04-01), Wilson, Jr.
patent: 4113230 (1978-09-01), McCabe
patent: 4133213 (1979-01-01), Brandt, Jr.
patent: 4154101 (1979-05-01), Buchanan et al.
patent: 4160380 (1979-07-01), Dunne, Jr. et al.
patent: 4170899 (1979-10-01), Fujita et al.
patent: 4453417 (1984-06-01), Moyers et al.
patent: 4454765 (1984-06-01), Lodge
patent: 4467824 (1984-08-01), Strulik et al.
patent: 4480467 (1984-11-01), Harter et al.
patent: 4625626 (1986-12-01), Aalto et al.
patent: 4958687 (1990-09-01), Nakagawa
patent: 5444947 (1995-08-01), Miller
patent: 5533929 (1996-07-01), Attridge, Jr.
patent: 5589643 (1996-12-01), Pyle
Ball John
Lamiflow Air Systems, Inc.
Perensic Denise L.
Rosen Steven J.
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