Fluid handling – Line condition change responsive valves – Direct response valves
Reexamination Certificate
2007-10-02
2007-10-02
Rivell, John (Department: 3753)
Fluid handling
Line condition change responsive valves
Direct response valves
C137S526000, C251S065000, C494S046000
Reexamination Certificate
active
10953972
ABSTRACT:
A pressure relief door system for use in a duct for relieving positive or negative pressure within the duct includes a frame to be mounted in the duct; a gasket in the frame; a hinged door mounted on the frame and sealing against the gasket; and an adjustable pressure relief mechanism normally holding the hinged door against the gasket and permitting the hinged door to open in response to a positive or negative pressure change. The frame and door can be mounted such that the door opens either outwardly from the duct in response to excess positive pressure or inwardly into the duct in response to excess negative pressure. The adjustable pressure relief mechanism may be magnetic.
REFERENCES:
patent: 2452612 (1948-11-01), Swenberg
patent: 2910209 (1959-10-01), Nelson
patent: 2935771 (1960-05-01), Hatcher, Jr.
patent: 3040393 (1962-06-01), Dailey
patent: 3332170 (1967-07-01), Bangs
patent: 3374580 (1968-03-01), Ruff
patent: 3402655 (1968-09-01), Stephenson et al.
patent: 3528453 (1970-09-01), Dunkelis
patent: 3541945 (1970-11-01), Wexler
patent: 3684342 (1972-08-01), Jansen
patent: 3685206 (1972-08-01), Kessler
patent: 3782062 (1974-01-01), Woods
patent: 3782411 (1974-01-01), Turner
patent: 3788514 (1974-01-01), Giacoma et al.
patent: 3818655 (1974-06-01), Carter
patent: 3921546 (1975-11-01), Makuch
patent: 3957001 (1976-05-01), Round
patent: 4140151 (1979-02-01), Van Becelaere
patent: 4184509 (1980-01-01), Kasper
patent: 4207706 (1980-06-01), Haines
patent: 4341041 (1982-07-01), Bloomfield
patent: 4356856 (1982-11-01), Bengtsson
patent: 4465499 (1984-08-01), Wawro et al.
patent: D275603 (1984-09-01), Brown
patent: 4502249 (1985-03-01), Banford
patent: 4513939 (1985-04-01), Berger
patent: 4538380 (1985-09-01), Colliander
patent: 4574973 (1986-03-01), Lewis, Jr. et al.
patent: 4598503 (1986-07-01), Berger et al.
patent: 4720261 (1988-01-01), Fishwick et al.
patent: 4731016 (1988-03-01), Dixon
patent: 5007202 (1991-04-01), Guillon
patent: 5069401 (1991-12-01), Shepherd et al.
patent: 5107622 (1992-04-01), Fuchs et al.
patent: 5161573 (1992-11-01), Krupp
patent: 5172519 (1992-12-01), Cooper
patent: 5177868 (1993-01-01), Kyle et al.
patent: 5279515 (1994-01-01), Moore et al.
patent: 5305969 (1994-04-01), Odell et al.
patent: 5414961 (1995-05-01), Tessier
patent: 5467764 (1995-11-01), Gamow
patent: 5560154 (1996-10-01), Matarazzo
patent: 5581951 (1996-12-01), Ryan et al.
patent: 5711706 (1998-01-01), Griffin et al.
patent: 5716271 (1998-02-01), Paidosh
patent: 5791408 (1998-08-01), Seem
patent: 5921043 (1999-07-01), McDonald
patent: 6223473 (2001-05-01), Romig
patent: 6488048 (2002-12-01), Kühmayer et al.
patent: 20315631 (2004-02-01), None
patent: 1406038 (2004-04-01), None
patent: 01102241 (1989-04-01), None
patent: 04110544 (1992-04-01), None
Web article, www.philasafetydevices.com/homepage/works.html, entitled “Instant Response Even at Low Pressures”, (2 pgs.).
Web article, www.greenheck.com/products/dampers/, entitled “Dampers”, (1 pg.).
Kees Incorporated brochure entitled “Positive Pressure Relief Door”, (5 pgs.).
Web article, www.ruskin.com, entitled “Positive Pressure Relief Door”, (1 pg.).
Web article, www.mcgillairflow.com, entitled “Access Doors for Duct Systems”, (2 pgs.).
Dexter Magnetic Technologies, entitled Nd-Fe-B Material Properties, (2 pgs.).
Ruskin Manufacturing Engineering Report entitled (Controlled Closure Fire/Smoke Damper Design Eliminates HVAC Duct System Damage, (4 pgs.).
United McGrill Corporation Engineering Bulletin entitled “Collapse of Supply Duct”, (2 pgs.).
Temtrol Brochure entitled “Custom Tailored Air Handling Products”, (26 pgs.).
University of Washington Enginnering Services Facility Design Information Packet, Aug. 2002, (12 pgs.).
A.J. Manufacturing, Inc.
Briggs and Morgan P.A.
Helget Gerald E.
Rivell John
LandOfFree
Pressure relief door for air duct work does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressure relief door for air duct work, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure relief door for air duct work will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3844499