Liquid infusion device

Details Liquid infusion device Liquid infusion device

A - Human Necessities

61

M

A61M 5/14 (2006.01) A61M 5/152 (2006.01)

Patent

CA 2046121

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.

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