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AssigneeWeil-McLain Co., Inc.
InventorsTrueman W. Hiller, Klaus D. Jarr
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A liquid dispensing and vapor recovery system and a vapor control unit used therein in which the control unit has a pair of inlets for receiving liquid, such as gasoline, from an underground storage tank and for receiving gasoline vapors from a vehicle tank during dispensing of the gasoline into the latter tank. A first passage is provided in the control unit for passing the gasoline from the storage tank to a hose connected to the vehicle tank, and an additional passage is provided in the control unit for diverting a portion of the gasoline. A valve is provided which controls the flow of gasoline through the additional passage in response to the flow of gasoline through the first passage and an injector nozzle is provided in the additional passage for drawing vapors from the vehicle tank and into the second passage for mixing with the gasoline before being discharged back to the storage tank.
A control unit for use in a liquid dispensing and vapor recovery system, said unit comprising a housing having first and second inlets for receiving liquid and vapor, respectively, and first and second outlets for discharging liquid and a mixture of liquid and vapor, respectively, first passage means in said housing connecting said liquid inlet and said liquid outlet, second passage means in said housing for diverting a portion of said liquid from said first passage means, said second passage means registering with said second inlet and said second outlet, means disposed in said second passage means for continuously changing the flow rate of liquid through said second passage means in proportion to changes in the flow rate of liquid through said first passage means, and means for drawing vapor through said second inlet and into said second passage means in proportion to the flow of liquid through said second passage means, said liquid and said vapor combining in said second passage means and discharging from said second outlet.
A liquid dispensing and vapor recovery system comprising storage means for said liquid;
Dependencies are inferred from the claim text.