Dispensing – Processes of dispensing
Patent
1995-05-05
1997-03-18
Huson, Gregory L.
Dispensing
Processes of dispensing
222 63, 222207, 604250, B67B 700
Patent
active
056114583
ABSTRACT:
A method and apparatus are provided for controlling the dispensing of a primary liquid from a pressurized source of primary liquid. Primary liquid is admitted through an inlet valve to a primary chamber having a primary element which is biased toward an initial position but is movable away from the initial position when subjected to the source pressure of the primary liquid. A sensor determines when the primary element has moved away from an initial position to a predetermined final position, and the inlet valve is closed in response thereto. The difference between the initial and final positions defines a predetermined dispensing volume. An outlet valve is opened to dispense the dispensing volume under the biasing force of the primary element which returns to the initial position. A sensor determines when the primary element has returned to the initial position, and the outlet valve is closed in response thereto.
REFERENCES:
patent: 4261356 (1981-04-01), Turner et al.
patent: 5188455 (1993-02-01), Hammerstedt
patent: 5230445 (1993-06-01), Rusnak et al.
patent: 5551599 (1996-09-01), Niss
Abrahamson Kent D.
Bryant Peter L.
Joyce Thomas P.
Ogden John E.
Ziegler John S.
Abbott Laboratories
Huson Gregory L.
Woodworth Brian R.
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