Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1995-08-01
1997-04-08
Look, Edward K.
Fluid handling
Line condition change responsive valves
Direct response valves
137541, 137542, 99337, F16K 2400
Patent
active
056178930
ABSTRACT:
A vacuum breaker valve assembly is provided including a housing mountable to a transport tank. The housing has a wall defining a passageway through the housing and there is a valve member movable within the housing. Structure is provided for permitting the valve member to move in response to variations in tank pressure between (1) and open state when atmospheric air external of the tank is allowed to travel through the passageway and into the tank once a predetermined vacuum pressure condition is reached, and (2) a closed state wherein the passageway is sealed to prevent atmospheric air travel into the tank when the predetermined vacuum pressure condition in the tank has not been reached. A housing lid is mounted to the housing and includes a vent hole for allowing atmospheric air to enter the housing passageway. A bottom wall integral with the housing wall includes a vent hole therethrough communicating with the interior of the tank. The bottom wall vent hole is sized sufficiently small to prevent the valve member moving structure from fitting therethrough.
REFERENCES:
patent: 204135 (1878-05-01), Convery
patent: 1525861 (1925-02-01), Franklin
patent: 1740567 (1929-12-01), Becker
patent: 1819827 (1931-08-01), Thwaits
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patent: 4273153 (1981-06-01), Brown
patent: 4998554 (1991-03-01), Rogers
patent: 5004011 (1991-04-01), Linder et al.
"Pressure Relief Vents for Tank Transports from Girard Equipment Inc.", Girard Equipment Inc., Rahway, New Jersey (1994).
"NOW!. . . a low cost vent that keeps your tanker safe!. . . " (1994).
"Certified Double Acting Olson Vent T-21642" (1994).
Look Edward K.
Transport Service Co.
Verdier Christopher
LandOfFree
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