Automatic valves
OwnerGraham William Osborneinventor
Life of this patent
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Abstract
An automatically operating shut-off valve has a valve body (12) with a weakened zone (15) about which the body will break, in the event the valve is subjected to a shock load. A valve seat (25) is formed within the body (12) and a valve member (29) is pivoted to move between an open position and a closed position, against the valve seat. The valve member is spring-urged to its closed position but is held in its open position by a crank (34) having a pin (35) bearing on a brittle glass rod (33). The valve will close whenever the rod (33) breaks, even if the shock load is only sufficient to crack the valve body, about the weakened zone.
Claims15
An automatically-operating valve comprising a body defining a flow passage and having a weakened zone around that passage, a valve member mounted within the passage for movement towards a closed position where the valve member closes the passage on one side of the weakened zone, spring means urging the valve member to said closed position, a brittle frangible link bridging the weakened zone, and a control mechanism bearing on the frangible link and controlling movement of the valve member under the action of the spring means.
Dependencies are inferred from the claim text.