Hydrocarbon fuel dispensing, vapor controlling system
AssigneeAtlantic Richfield Company
InventorsFrederick L. Voelz, Peter P. Moskovich, William J. Kosinski
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Abstract
An improvement in a liquid dispensing, vapor controlling system is disclosed. The improvement senses and responds to the presence of liquid flowing in the vapor passageway of the system and, as preferred, to the existence of an abnormal pressure in a liquid receiver with which the system is utilized.
Claims20
In a liquid dispensing, vapor controlling system having a vapor passageway, the improvement of apparatus for sensing and responding to the presence of a predetermined amount of liquid flowing in the vapor passageway, said apparatus adapted to be utilized with means for supplying a flow of gas and with means for generating a signal in response to a predetermined gas flow, said apparatus comprising, in combination:
- sensor means for defining at least one port opening into said vapor passageway, said port located within said vapor passageway so that when a predetermined amount of liquid is flowing therein, said port is at least partially blocked with liquid;
- and
- control means having a first inlet, a second inlet, and an outlet, said first inlet connected to said sensor means, said second inlet connected to said supply means, and said outlet connected to said signal means, said control means causing gas to flow in said sensor means for monitoring the gas flow therein and for generating said predetermined gas flow in said outlet whenever the pressure in said sensor means exceeds a preselected value, whereby said apparatus generates said signal in response to a predetermined flow of liquid in said vapor passageway due to and at least partial blockage of said port.
Dependencies are inferred from the claim text.