Automatic two-chamber injector

Details Automatic two-chamber injector Automatic two-chamber injector

1988-04-12

1991-01-08

Pellegrino, Stephen C.

Surgery

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

Treating material introduced into or removed from body...

604 56, 604139, A61M 3700

Patent

active

049831640

ABSTRACT:
The invention relates to an automatic two-chamber injector for mixing and injecting a medical solution. The injector comprises a barrel (11) having a first end with a receiving portion (15) for an injection needle (17), said portion being sealed prior to use, and a second end with a displaceable plunger (27). The barrel (11) comprises two chambers (29, 30) separated by a migrationproof membrane (28), said membrane (28) being adapted to rupture when the plunger (27) is displaced towards the first end of the barrel (11).
The invention also related to a method for mixing and injecting a solution by means of an automatic two-chamber injector and to a cartridge for a two-chamber injector.

REFERENCES:
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patent: 2778360 (1957-01-01), Miskel
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patent: 3340873 (1967-09-01), Solowey
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patent: 4202314 (1980-05-01), Smirnov et al.
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patent: 4413991 (1983-11-01), Schmitz et al.
patent: 4529403 (1985-07-01), Kamstra
patent: 4648532 (1987-03-01), Green

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