Safety shutoff valve
AssigneeMcGillis Engineering, Inc.
InventorHugh D. McGillis
Life of this patent
Estimating the term…
Abstract
A safety shutoff valve for fuel storage tanks and the like includes a housing with a float controlled valve member which closes in response to the rising liquid level in the tank to which the valve is attached. An elongated tubular member is attached to the valve outlet and projects an appreciable distance below the valve member that when the liquid level is high enough to close off the opening in the elongated member, a back pressure is developed within the elongated member and valve housing which causes the valve member to close and seat relatively gently under high pressure fill conditions. Special openings are provided in a baffle over the valve member to allow a portion of the incoming liquid to impinge upon the valve member to help urge it beyond the baffle whereupon it is driven to its closed position by the incoming liquid stream.
Claims4
A safety shutoff valve of the type having a housing with an inlet and an outlet, a baffle inside the housing partially closing the passageway between said inlet and outlet, a valve member inside the housing swingable from an open position wherein it underlies the baffle and a closed position wherein it closes the passage between said inlet and outlet, the improvement comprising
- A. means for biasing the valve member toward its open position,
- B. an opening through the baffle,
- C. a door mounted in the housing and movable between a closed position wherein it closes the opening through the baffle and an open position wherein it permits liquid to flow through the opening,
- D. means for biasing the door to its closed position,
- E. a movable member mounted on the housing and movable between first and second positions in response to the level of liquid relative to the housing, and
- F. means linking the door and the movable member so that when the movable member is in its first position, the door is closed and when the movable member is in its second position, the door is open so that incoming liquid flows through said opening and engages behind the valve member, driving it to its closed position.
Dependencies are inferred from the claim text.