| 摘要 |
An automatic continuous flow liquid dispensing device for dispensing liquid onto a receiving surface of an article includes an improved flow control mechanism comprising a threaded elongate shaft retained in threaded engagement by a base member securely attachable to the external housing, so as to be selectively rotatably movable to any one of a plurality of stop positions. The threaded shaft is positioned to be contactable by a valve of the dispensing device, thereby acting as a backstop to preclude the valve from reaching its full flow position, and thus defining a plurality of partial flow positions. An electric motor rotates the threaded shaft in first and second rotational directions, to selected stop positions. Electrical controls are connected in electrically conductive relation to the electric motor for selective control thereof. Sensors are mounted on the dispensing device to sense ongoing conditions of selected parameters representative of specific circumstances related to the operation of the liquid dispensing device, and to generate quantitative values corresponding to the selected parameters. The sensors are connected in electrically conductive relation to the electrical control so as to provide feedback signals thereto. The feedback signals are derived from the quantitative values generated by the sensors. The electrical control process the feedback signals in real time and provide control signals to the electric motor. The control signals are a function of the feedback signals from the sensors, and thereby control the electric motor in accordance with the quantitative values.
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