Miniature infusion pump
First Claim
1. A micro pump device for dispensing proportioned quantities of medical fluid by applying pulsed pressure on syringe'"'"'s plunger stem containing the medical fluid which is injected through syringe-tube connector to the patient'"'"'s body, said device comprised of:
- a vertically expending actuator means for applying pressure at the direction of the syringe plunger wherein the actuator activation is controlled by a programmable logic means;
a stopper element for preventing the actuator movement in the opposite direction;
plunger stem holder for preventing the plunger'"'"'s movement back toward the actuator;
guiding walls for applying pressure on the plunger stem holder;
power mechanism causing gradual movement of the stopper toward the actuator.
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Accused Products
Abstract
A micro-pump that supplies medication from a reservoir to a patient through a flexible tube is disclosed. The pump, which is especially suitable but not confined to delivering insulin to diabetic patients, is small and light enough to be attached to the body using adhesive plaster or to be strapped to the body in any other manner. In the preferred embodiment the pump mechanism comprises a lead screw, a weak force rotating element, an actuator, and a high force holding element. The device also includes a processing circuitry for controlling and monitoring the drive mechanism, a force sensor to measure medication pressure which generates indicative signals to the processing circuitry, a sensor for tracking the position of the syringe plunger, and a remote control unit.
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Citations
16 Claims
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1. A micro pump device for dispensing proportioned quantities of medical fluid by applying pulsed pressure on syringe'"'"'s plunger stem containing the medical fluid which is injected through syringe-tube connector to the patient'"'"'s body, said device comprised of:
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a vertically expending actuator means for applying pressure at the direction of the syringe plunger wherein the actuator activation is controlled by a programmable logic means;
a stopper element for preventing the actuator movement in the opposite direction;
plunger stem holder for preventing the plunger'"'"'s movement back toward the actuator;
guiding walls for applying pressure on the plunger stem holder;
power mechanism causing gradual movement of the stopper toward the actuator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification