Injector with programming means
First Claim
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1. Fluid dispensing apparatus for injecting fluid into a patient at an average prescribed rate over a prolonged period of time comprising:
- a container defining a fluid chamber therein carrying fluid to be dispensed and an outlet from said fluid chamber connected to the patient;
a piston slidably mounted in said fluid chamber for forcing fluid from said outlet as said piston is moved toward said outlet;
an electrical power supply;
electrically operated driving means for moving said piston toward said outlet when said electrically operated driving means is connected to said power supply; and
control means for selectively connecting said electrical power supply to and disconnecting said electrical power supply from said electrically operated driving means;
said control means including switching means for selectively connecting said electrical power supply to said electrically operated driving means;
timing pulse generator means for operating said switching means;
programming means for selectively controlling the timing pulse rate output of said timing pulse generator; and
mode selector means for selectively activating said programming means to permit adjustment said programming means to change the timing pulse rate output of said timing pulse generator means and for selectively causing said timing pulse generator means to generate the timing pulse rate output selected by said programming means while preventing adjustment of said programming means.
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Abstract
Method and apparatus for injecting fluids into patients at a controlled rate from an ampule containing the injecting fluid with a sliding piston therein to force the fluid from the ampule into the patient using a drive system which incrementally and successively advances the piston in the ampule to meter the fluid into the patient.
45 Citations
4 Claims
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1. Fluid dispensing apparatus for injecting fluid into a patient at an average prescribed rate over a prolonged period of time comprising:
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a container defining a fluid chamber therein carrying fluid to be dispensed and an outlet from said fluid chamber connected to the patient; a piston slidably mounted in said fluid chamber for forcing fluid from said outlet as said piston is moved toward said outlet; an electrical power supply; electrically operated driving means for moving said piston toward said outlet when said electrically operated driving means is connected to said power supply; and control means for selectively connecting said electrical power supply to and disconnecting said electrical power supply from said electrically operated driving means;
said control means including switching means for selectively connecting said electrical power supply to said electrically operated driving means;
timing pulse generator means for operating said switching means;
programming means for selectively controlling the timing pulse rate output of said timing pulse generator; and
mode selector means for selectively activating said programming means to permit adjustment said programming means to change the timing pulse rate output of said timing pulse generator means and for selectively causing said timing pulse generator means to generate the timing pulse rate output selected by said programming means while preventing adjustment of said programming means. - View Dependent Claims (2, 3, 4)
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Specification