초록 ▼

The present disclosure describes a system wherein a drug or other fluid to be delivered to a specific desired location within the body is stored in a reservoir that is directly displaced by a force to infuse the drug from the device into the patient. Several specific methods are used to displace the

The present disclosure describes a system wherein a drug or other fluid to be delivered to a specific desired location within the body is stored in a reservoir that is directly displaced by a force to infuse the drug from the device into the patient. Several specific methods are used to displace the reservoir, including, generally, hydraulic displacement, mechanical screw-type displacement, and spring force displacement of the fluid reservoir.

대표청구항 ▼

[ What is claimed is:] [1.] A periodically refillable drug infusion device to be implanted within a living body, comprising:a drug fluid reservoir for receiving a supply of drug fluid;a spring force displacer for selectively controlling the egress of drug fluid from said drug fluid reservoir for del

[ What is claimed is:] [1.] A periodically refillable drug infusion device to be implanted within a living body, comprising:a drug fluid reservoir for receiving a supply of drug fluid;a spring force displacer for selectively controlling the egress of drug fluid from said drug fluid reservoir for delivery into said living body, said displacer including a bellow-like expandable chamber annealed so that the chamber in its natural state assumes a collapsed position, and in an expanded state the chamber tends toward its natural collapsed position under its own action; anda motor assembly, including a motor operatively coupled to a flywheel about which a first end of a cable having first and second ends is wrapped, said second end of said cable being attached to said bellows-like expandable chamber and wherein said motor assembly adjusts the position of the bellows-like expandable chamber as it relaxes from a first expanded state to a second more collapsed state to control the displacement of the fluid reservoir.