Two-compartment syringe assembly and a method of producing a two-compartment syringe assembly
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United States of America Patent
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Jul 4, 1995
Grant Date -
N/A
app pub date -
Jan 2, 1992
filing date -
Dec 4, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A two-compartment syringe assembly (10) is composed of a first, outer cylindrical barrel (12), a second, inner cylindrical barrel (14). in which a material (66) is enclosed within a capsule part or ampulla (16) which is received and protected within the second cylindrical barrel, a plunger (18) and a liquid (20), which is enclosed within a first compartment defined within the first cylindrical barrel (12). As the material is concealed within the second cylindrical barrel, any risk of leakage of the material to the environment or atmosphere in case the two-compartment syringe assembly is exposed to shocks, such as mechanical blows, is radically reduced as compared to conventional two-compartment syringe assemblies. Furthermore, any toxic aerosols and gases generated as the material (66) is dispensed from the ampulla (16) to the first compartment containing the liquid (20) are vented through an activated carbon filling (90) of a central plunger body (82) of the plunger (18), which plunger body serves the purpose of dispensing the material (66) from the ampulla (16) as the two-compartment syringe assembly is operated.
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