| 摘要 |
<p>TAMPER PROOF SAFETY CUT-OFF FLUID NOZZLE A fluid nozzle designed to shut off when the pressure of the fluid exiting the nozzle reaches a predetermined value, e.g., 30 psi, as set forth in OSHA regulations. The nozzle has a body having an inlet, an outlet, a passage therebetween, and a conventional valve for manually opening and closing the passage between the inlet and outlet. An apertured closure is inserted in the outlet and has a valve seat on its inner surface. A valve having a face on its one end and a passageway through the valve is positioned in the passage to slideably move between the valve seat of the apertured closure and a valve stop. A vent hole through the wall of the body is located between the conventional opening and closing valve and the valve stop. A spring biases the valve against the valve stop in an open position against the flow of fluid through the passage until the pressure exerted by the fluid flowing through the passage overcomes the force exerted by the biasing spring and moves the valve with the flow of fluid so that the valve face and seat make contact and close the apertured closure of the nozzle.</p> |
