Presure controlled system for filling an implantable drug infusi

Details Presure controlled system for filling an implantable drug infusi Presure controlled system for filling an implantable drug infusi

1995-04-13

1996-12-24

Recla, Henry J.

Fluent material handling, with receiver or receiver coacting mea

Filling or refilling of dispensers

By operation of means causing or controlling dispensing

141 25, 141192, 604 65, 604237, B65B 104, B65B 304

Patent

active

055866298

ABSTRACT:
An implantable drug infusion pump filling system includes a filling syringe, a pressure control valve, a filling tube, and an implantable drug infusion pump. The pressure of the drug or agent loaded into the pump is prevented from exceeding a selected maximum pressure by the pressure control valve. The pressure control valve comprises a valve body that has an inlet passage coupled to the filling syringe, an internal chamber, and a discharge passage coupled to the pump. The inlet passage, the internal chamber, and the discharge passage form a flow passage for the flow of the drug. A mandrel is slidably disposed in the valve body. The mandrel is coupled to a flexible membrane, which is, in turn, coupled to a biasing member. When the pressure of the drug or agent acting on the flexible membrane exceeds the spring constant of the biasing member, the mandrel moves to a closed position, shutting off the flow passage.

REFERENCES:
patent: 3650699 (1972-03-01), Beer
patent: 4074694 (1978-02-01), Lee
patent: 4606371 (1986-08-01), Maekawa
patent: 5158547 (1992-10-01), Doan et al.

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