Potentiometer-controlled fluid ejection device
First Claim
1. An infusion device for delivering fluid from a flexible plastic container, the infusion device comprising:
- a receptacle for the flexible plastic container;
a fixed, clear and transparent front plate, bent at its sides to contact one side of the container;
a movable plate to contact and press the other side of the container, the movable plate having a high friction rubber-type coating to keep the container in place, the movable plate positioned in an essentially parallel alignment with the fixed, clear and transparent front plate bent at its sides, to squeeze the container from its middle surface area;
an electromechanical driving set to advance and retract the movable plate; and
an electronic control set comprising a precision potentiometer linked to an electronic circuitry and software and to a liquid crystal display, to control a motor-driven shaft rotation speed.
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Accused Products
Abstract
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.
105 Citations
8 Claims
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1. An infusion device for delivering fluid from a flexible plastic container, the infusion device comprising:
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a receptacle for the flexible plastic container; a fixed, clear and transparent front plate, bent at its sides to contact one side of the container; a movable plate to contact and press the other side of the container, the movable plate having a high friction rubber-type coating to keep the container in place, the movable plate positioned in an essentially parallel alignment with the fixed, clear and transparent front plate bent at its sides, to squeeze the container from its middle surface area; an electromechanical driving set to advance and retract the movable plate; and an electronic control set comprising a precision potentiometer linked to an electronic circuitry and software and to a liquid crystal display, to control a motor-driven shaft rotation speed. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A potentiometer controlled infusion device to eject fluid by squeezing flexible, fluid-containing plastic bags, comprising:
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a housing having a fixed, clear and transparent front plate, bent at its sides to form a receptacle to accommodate the fluid-containing bag, said receptacle further defined by a movable plate having an essentially parallel alignment and displacement relative to the fixed plate; said housing further defining an upper cavity to facilitate transport of the device by hanging it up; a liquid crystal display to show entered and achieved fluid ejection parameters, said liquid crystal display having a tilting capability; and an electronic control set comprising a precision potentiometer and electronic circuitry and software to control an electric motor rotation speed and torque by adjusting an electric current intensity feeding the motor.
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Specification