Valving assembly for a liquid-containing tank
First Claim
1. A valving assembly for a liquid-containing tank, comprising a housing generally divided into first and second axially extending passageways providing separate paths of communication between the inside and outside of the tank, the housing being formed to provide a first inwardly facing valve seat in the first passageway and a second axially outwardly facing valve seat in the second passageway, a first valve member positioned in the first passageway, a first spring for supporting the first valve member out of engagement with the first valve seat normally to open the first passageways when the tank is in an upright orientation, the first spring being calibrated to urge the first valve member into engagement with the first valve seat to close the first passageway when the tank is tilted downwardly to a predetermined angle relative to a horizontal plane, a second valve member positioned in the second passageway, and a second spring for yieldably urging the second valve member into engagement with the second valve seat normally to close the second passageway, the second spring being calibrated to provide movement of the second valve means out of engagement with the second valve seat when the pressure in the tank exceeds a predetermined superatmospheric level.
6 Assignments
0 Petitions
Accused Products
Abstract
A valving assembly for a liquid-containing tank comprises a housing which includes vent and valve passageways extending axially therethrough. A roll-over valve is supported in the vent passageway by a spring which is calibrated normally to open the vent passageway to normalize the pressure inside the tank. Movement of the roll-over valve is assisted by the spring to close the vent passageway and prevent movement of the liquid from the tank when the tank is tilted. An excessive pressure valve is disposed in the valve passageway and urged by a spring normally to close the valve passageway. The spring is calibrated to provide movement of the excessive pressure valve member to open the valve passageway when the vent passageway is closed and superatmospheric pressure within the tank exceeds a predetermined level.
-
Citations
14 Claims
- 1. A valving assembly for a liquid-containing tank, comprising a housing generally divided into first and second axially extending passageways providing separate paths of communication between the inside and outside of the tank, the housing being formed to provide a first inwardly facing valve seat in the first passageway and a second axially outwardly facing valve seat in the second passageway, a first valve member positioned in the first passageway, a first spring for supporting the first valve member out of engagement with the first valve seat normally to open the first passageways when the tank is in an upright orientation, the first spring being calibrated to urge the first valve member into engagement with the first valve seat to close the first passageway when the tank is tilted downwardly to a predetermined angle relative to a horizontal plane, a second valve member positioned in the second passageway, and a second spring for yieldably urging the second valve member into engagement with the second valve seat normally to close the second passageway, the second spring being calibrated to provide movement of the second valve means out of engagement with the second valve seat when the pressure in the tank exceeds a predetermined superatmospheric level.
-
14. A valving assembly for a liquid-containing tank, comprising a housing providing vent and valve passageways extending axially therethrough in spaced parallel relationship to each other, means for connecting the housing to the tank, the housing being formed to provide a first axially inwardly facing valve seat in the vent passageway, and a second axially outwardly facing valve seat in the valve passageway, a first valve member positioned in the vent passageway to move axially outwardly into closing engagement with the first valve seat when the tank is tilted, first spring means for urging the first valve member axially toward the first valve seat, the first spring means being calibrated normally to support the first valve member out of engagement with the first valve seat and open the vent passageway when the tank is in an upright orientation to vent vapors from the tank and to assist in moving the first valve member into engagement with the first valve seat when the tank is tilted downwardly to a predetermined angle, a second valve member positioned in the valve passageway to move axially outwardly out of engagement with the second valve seat when superatmospheric pressure in the tank exceeds a predetermined level, and a second spring for yieldably urging the second valve member axially inwardly against the second valve seat normally to close the valve passageway, the second spring means being calibrated to provide movement of the second valve member axially outwardly away from the second valve seat when the superatmospheric pressure in the tank exceeds the predetermined level.
Specification