Storage device with positive displacement dispenser by means of

Details Storage device with positive displacement dispenser by means of Storage device with positive displacement dispenser by means of

1992-12-17

1994-09-27

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

604200, 604201, 604218, 604231, A61B 500

Patent

active

053503660

ABSTRACT:
A positive displacement ampule for storing a fluid therein and dispensing the fluid therefrom. The ampule includes an elongate vessel for storing the fluid having a large diameter base portion at one end thereof joined to a small diameter stem portion at the other end thereof, a piston disposed in the vessel at the base end thereof for forcing the fluid from the vessel, a fracture probe for fracturing the base end of the vessel and a needle for inserting into the fractured base end of the vessel and for piercing the piston such that one end of the needle protrudes outwardly from the vessel and the other end of the needle communicates with the fluid in the vessel. In this manner, the fluid is pumped from the vessel through the needle by pushing the piston in the direction of the fluid. The positive displacement ampule is manufactured by providing the elongate vessel with the stem end of the vessel being open and the base end of the vessel being closed, injecting a monomer liquid into the vessel through the open stem end thereof, polymerizing the liquid so as to convert the liquid to a solid designed to function as a piston, injecting the fluid into the vessel through the open stem end thereof in such a manner as to maintain the fluid between the piston and the stem end and sealing the stem end of the vessel.

REFERENCES:
patent: 3534735 (1970-10-01), Sly
patent: 4020831 (1977-05-01), Adler
patent: 4037464 (1977-07-01), Wenander
patent: 4191225 (1980-03-01), Ogle
patent: 4259956 (1981-04-01), Ogle
patent: 4390016 (1983-06-01), Riess
patent: 4648532 (1987-03-01), Green
patent: 4684366 (1987-08-01), Denny et al.
patent: 4828540 (1989-05-01), Walter
patent: 4976966 (1990-12-01), Theeuwes et al.
patent: 4982740 (1991-01-01), Broden

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