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AssigneeSt-Mihiel S.A.
InventorDidier D. Parey
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A fire hose nozzle includes a safety device to prevent the nozzle from being displaced due to the action of the water supplied to the nozzle. The safety device includes a tubular body and a butterfly disc with two coaxial trunnions pivotally mounted on the body. The butterfly disc is movable inside the tubular body between an open position, in which the butterfly disc allows water to flow, and a closed position, in which the butterfly disc restricts this flow. An external control lever is integral with one of the trunnions. A trigger is borne by the control lever and bears against the ground. The trigger holds the butterfly disc in its open position when the control lever exerts a downwardly directed vertical force thereon due to the action of the water flowing over the butterfly disc.
A fire hose nozzle comprising a safety device (1) for preventing the fire hose nozzle from being displaced due to action of water supplied to the nozzle, characterised in that the safety device includes a tubular body (3) designed to be connected to a water supply hose (2), a butterfly disc (5) including two coaxial trunnions (6) pivotally mounted on the tubular body (3), on a horizontal axis extending perpendicularly to a direction of flow of the water, the butterfly disc being movable inside the tubular body between an open position, in which the butterfly disc allows the water to flow, and a closed position, in which the butterfly disc restricts this flow, an external control lever integral with one of the trunnions (6), and a triggering means (8) borne by the control lever (7) and bearing against a ground surface, holding the butterfly disc (5) in its open position when the control lever exerts thereon, due to the action of the water flowing over the butterfly disc, a downwards directed vertical force.
Dependencies are inferred from the claim text.