Liquid infusion device

Details Liquid infusion device Liquid infusion device

1991-07-01

1993-01-12

Mancene, Gene

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

128DIG12, A61M 3700

Patent

active

051786109

ABSTRACT:
A liquid infusion device comprising a bladder assembly, an approximately tubular housing, and a liquid-drug-dispensing portion. The bladder assembly comprises a rod-like inner shaft, a tubular outer shaft slidably encasing the inner shaft, an inner shaft supporter, and a bladder made of elastic material and placed outside two shafts. The housing contains the bladder assembly and has an inlet/outlet portion at an end of the housing. The inner shaft supporter has at least one port for liquid drug communicating with the inlet/outlet portion. An amount of liquid drug remaining in the bladder can be greatly reduced, since a clearance between the inner shaft and outer shaft can be made very small.

REFERENCES:
patent: 3961725 (1976-06-01), Clark
patent: 4386929 (1983-06-01), Peery et al.
patent: 4909790 (1990-03-01), Tsujikawa

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