초록 ▼

An automatic shut-off nozzle has liquid flow through its vapor return automatically stopped when liquid has filled the vapor line sufficiently in a predetermined period of time to move a float valve to block the vapor return line. This blocking of the vapor return line by the liquid increases the pr

An automatic shut-off nozzle has liquid flow through its vapor return automatically stopped when liquid has filled the vapor line sufficiently in a predetermined period of time to move a float valve to block the vapor return line. This blocking of the vapor return line by the liquid increases the pressure in the tank being filled to cause the automatic shut-off nozzle to stop liquid flow. If the pressure in the tank increases beyond a predetermined pressure when the float valve is in its blocking position, the increased pressure is vented. The automatic shut-off nozzle also stops flow in response to the tank being filled to a predetermined level with liquid or to the pressure in the tank exceeding a predetermined pressure even when there is no blocking of the vapor line by the float valve.

대표청구항 ▼

An arrangement for sensing the presence of liquid in a vapor line including a body having an inlet communicating with a source of liquid and vapor and an outlet communicating with an area for receiving vapor, said body having passage means therein connecting said inlet and said outlet, and movable m

An arrangement for sensing the presence of liquid in a vapor line including a body having an inlet communicating with a source of liquid and vapor and an outlet communicating with an area for receiving vapor, said body having passage means therein connecting said inlet and said outlet, and movable means disposed in said body and movable between a non-blocking position in which said movable means does not block said passage means and a blocking position in which said movable means blocks said passage means, said movable means moving to its blocking position when a selected predetermined quantity of liquid flows into said inlet of said body in a selected predetermined period of time whereby the presence of liquid is sensed due to said movable means being in its blocking position without venting any liquid or vapor to the ambient.