Dispensing – Automatic control – Temperature responsive or soluble controller
Patent
1989-09-20
1991-06-11
Hajec, Donald T.
Dispensing
Automatic control
Temperature responsive or soluble controller
7386142, 222 59, B67D 508
Patent
active
050225570
ABSTRACT:
A beverage dispensing means includes a pressurized beverage container, a flow meter connected between the pressurized container and a faucet. A valve assembly is attached to the faucet for opening and closing the faucet responsive to an electromechanical actuator. A programmable controller in response to differential pressure indicating signals produced by the flow meter determines the flow rate incrementally and the incremental quantities are accumulated for comparison with a preselected programmed quantity for pouring a preselected quantity of the beverage and actuates the electromechanical actuator for the time necessary to pour the selected amount of beverage. The flow meter includes a line segment of known length, size and material. The known length provides a measurable pressure difference owing to the drag therein as opposed to the measurable pressure difference obtained from the head of a manometer type flow meter. Thus, a substantially larger difference pressure measurement is obtainable. A differential pressure transducer is connected to passageways connected to line segment ports located at beginning and ending points of the line segment for measuring the pressure differential and outputting electrical signals indicative thereof for use by the programmable controller in determining continuously during the pouring time the quantities for a preselected amount of the beverage. The valve assembly includes a valve stem sleeve attached between the faucet ends. The sleeve includes at the end adjacent to the faucet a seal expander for wiping clean during valve cleaning the portion of the valve stem exposed to the beverage during valve opening. This prevents seepage of the beverage into the valve sleeve where it can solidify to stick the valve.
REFERENCES:
patent: 3666143 (1972-05-01), Weston
patent: 3718233 (1973-02-01), Nordhoff
patent: 3813008 (1974-05-01), Olson
patent: 4004715 (1977-01-01), Williams et al.
patent: 4111243 (1978-09-01), Fetterman
patent: 4646940 (1987-03-01), Kramer et al.
patent: 4821580 (1989-04-01), Jorritsma
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