Shear valve
AssigneeRisbridger Limited
InventorGraham M. Stuart
Life of this patent
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Abstract
A shear valve for use in a fuel delivery system includes a valve body wherein a first end is adapted to be connected to a fuel inlet, and a second oppositely-disposed end is adapted to be connected to a fuel outlet. The valve body is provided with a readily frangible or separable region between the first and second ends. The first end has an emergency shut-off valve biased towards a closed position, and is normally held open by a displaceable abutment having one ball or roller.
Claims9
A shear valve for use in a fuel delivery system which comprises a valve body wherein a first end is adapted to be connected to a fuel inlet and a second oppositely disposed end is adapted to be connected to a fuel outlet, said first end including an emergency shut-off valve which is biased towards its closed position and the valve body having a readily frangible or separable region between said ends and said emergency shut-off valve being normally held open by a displaceable abutment comprising a ball, normally held in place by engagement with a pointed member, the arrangement being such that distortion or breakage of the valve body causes relative displacement of the ball and the member with resulting closure of the shut-off valve.
Dependencies are inferred from the claim text.