| 摘要 |
A potentiometer-controlled electromechanic system to eject fluids by squeezing flexible plastic containers. The system comprises an electromechanic driving set, including an electric motor-driven shaft with a worm gear engaged to rack gear sections of arms attached to a movable presser plate, that squeeze a fluid-containing flexible plastic bag inserted in a cavity formed at the front portion of the device housing. The cavity is formed by a movable presser plate and a fixed clear and transparent front plate, bent at its sides. The fluid ejection parameters are controlled by an electronic set comprising a precision potentiometer attached to the motor-driven shaft, linked to a microprocessor-based electronic circuitry and a programming set formed by a series of buttons for entering the required ejection parameters, such as fluid flow rate, pressure, ejected volume, etc. The parameters are visualized in a liquid-crystal display. During the ejection procedure, the motor-driven shaft speed is monitored by the precision potentiometer, whose electric impulses are compared, at the central processing unit, to the entered required parameters. The central processing unit calculates the needed electric motor torque and rotation speed and the operating time. The device is applicable to medical uses, to inject fluids contained in flexible plastic bags into a patient, at precisely controlled parameters, as well as other non-medical applications.
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