Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1989-11-27
1990-12-04
Michalsky, Gerald A.
Fluid handling
Line condition change responsive valves
Direct response valves
4209FF, 4211, 4218, 137544, 137545, 137550, E03C 112
Patent
active
049746324
ABSTRACT:
An automatic air valve for a conduit, through which passes fluids and/or solids, which valve utilizes a freely-movable valve member to prevent the discharge of contaminated air therefrom into the environment and to permit the introduction of fresh air from the environment into the conduit when a negative pressure develops therein. The air valves may be disposed at either the terminus of or interposed within the conduit flow line of a duct system. The air valves include an interior filter that restrains foreign objects, such as insects and snakes, in the duct system from operatively interfering with the freely-movable valve member. Means is also included for preventing the interior filter to move or to be moved into a position wherein the interior filter may operatively interfere with the freely-movable valve member. The interior filters are nonplanar in shape, so as to provide a total air passage area that is substantially the same as the air passage area that is present without the interior filter.
REFERENCES:
patent: 1111633 (1914-09-01), Young
patent: 1303529 (1919-05-01), York
patent: 1627840 (1927-05-01), Donnelly
patent: 1681697 (1928-08-01), Brooks
patent: 2346022 (1944-04-01), Gonia
patent: 2405241 (1946-08-01), Smith
patent: 3923081 (1975-12-01), Persson
patent: 4198726 (1980-04-01), Powell
patent: 4232706 (1980-11-01), Ericson
patent: 4535807 (1985-08-01), Ericson
patent: 4712574 (1987-12-01), Perrott
Bloom Leonard
Michalsky Gerald A.
LandOfFree
Automatic air valves for ducts does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic air valves for ducts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic air valves for ducts will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-877827