Metering device for implantable delivery system

Details Metering device for implantable delivery system Metering device for implantable delivery system

A - Human Necessities

61

M

A61M 5/168 (2006.01) G01F 11/04 (2006.01) G01F 11/16 (2006.01)

Patent

CA 2113835

A fluid metering element (1) useful in an implantable delivery system (1') is coupled between a pressurized fluid source (100') and an outlet conduit (106) to provide discrete flow pulses at a predetermined rate. The metering element (1) consists of a first movable member (3) constrained within a housing (2) and a second movable member (4) retained in a recess (12) by the first. Alternate positioning of the first member simultaneously fills and empties a cavity (16) in which the second resides, discharging fluid through the conduit. The first movable member can be a planar slider (3), an axially translatable cylinder (131) or a rotatable cylinder (144). The second movable member may be a flat shuttle (4), a sliding bar (130) or a diaphragm (161).

Elément (1) de dosage de liquide utile dans un système (1') implantable d'administration de médicaments qui relie une source de liquide sous pression (100') à un tuyau de sortie (106) afin de produire des impulsions de débit discrètes à un rythme prédéterminé. L'élément de dosage (1) est constitué d'un premier élément mobile (3) encastré dans un logement (2) et d'un second élément mobile (4) retenu dans un évidement (12) par le premier élément. Le positionnement alterné du premier élément permet simultanément le remplissage et le vidage d'une cavité (16) dans laquelle est logée le second élément, entraînant ainsi l'évacuation du liquide par le tuyau. Le premier élément mobile peut être une coulisse plane (3), un cylindre à translation axiale (131) ou un cylindre rotatif (144). Le second élément mobile peut être une navette plate (4), une barre coulissante (13) ou un diaphragme (161).

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