Patent ID: 7967025
Filing Date: 2011-06-28
Classification: F16K,F17C,Y10T

Abstract:
1. An overfill protection device for a container, the overfill protection device comprising: a housing mounted at an opening to the container, the housing having at least a first hole and a second hole on a side thereof, the first and second holes being longitudinally positioned along a length of the housing; a movable piston within the housing, an interior of the piston having a plurality of stepped chambers, the first hole in the housing being adjacent an exterior of one of the stepped chambers and the second hole in the housing being adjacent an exterior of another of the stepped chambers; a main valve movable mounted beneath the piston; a retainer for holding the main valve adjacent the piston, the retainer being mounted to an end of the housing; and a pivotable lever arm having a cam, the cam of the lever arm having at least two faces, one of the faces moving the main valve to close a retainer opening in the retainer to thereby prevent flow through the retainer opening while pivoting of the lever arm to an open position engages another one of the faces of the cam with the main valve to thereby open the retainer opening and permit filling of the container, the stepped chambers of the piston being connected wherein at least one of gas and liquid can flow from the container opening through the piston to the retainer opening when the piston is in an open position, at least one of gas and liquid can also flow from the container opening outside of the piston and inside of the housing and pass through the first and second holes of the housing.