Passive shuttle metering device for implantable drug delivery sy

Details Passive shuttle metering device for implantable drug delivery sy Passive shuttle metering device for implantable drug delivery sy

1991-08-30

1993-05-04

Rosenbaum, C. Fred

Surgery

Controlled release therapeutic device or system

Implanted dynamic device or system

604246, 128DIG12, A61M 3100

Patent

active

052076660

ABSTRACT:
A fluid metering device useful in implantable drug delivery systems is coupled between a pressurized fluid source and an outlet conduit to provide discrete flow pulses at a predetermined rate. The metering device consists of a first movable member constrained within a housing and a second movable member retained in a cavity by the first. Alternate positioning of the first member simultaneously fills and empties the cavity in which the second resides, discharging fluid through the conduit. The first movable member can be a planar slider, an axially translatable cylinder or a rotatable cylinder. The second movable member may be a flat shuttle, a sliding bar or a diaphragm.

REFERENCES:
patent: 4634430 (1987-01-01), Polaschegg
patent: 4714462 (1987-12-01), DiDomenico
patent: 4838860 (1989-06-01), Groshong et al.
patent: 4838887 (1989-06-01), Idriss
patent: 4931050 (1990-06-01), Idriss
patent: 5109850 (1992-05-01), Blanco et al.

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