Needleless syringe which functions with the active agent...

Details Needleless syringe which functions with the active agent... Needleless syringe which functions with the active agent...

2005-07-05

2005-07-05

Lucchesi, Nicholas D. (Department: 3763)

Surgery

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

Treating material introduced into or removed from body...

C604S068000, C604S048000

Reexamination Certificate

active

06913593

ABSTRACT:
The invention relates to a needleless syringe (1), comprising the following' successively: a gas generator, a gas expansion chamber (3), a means for retaining particles of the active agent and a tube (6) for ejecting said particles. The main characteristic of the inventive syringe is that the gas generator is a pyrotechnic generator (2), comprising a pyrotechnic charge (10) which generates gas, a gas generator and an initiation device. The invention is also characterized in that the retaining means comprise at least one lid (8), which is fixed to the ejection tube and is configured to break under the influence of the gases generated by the combustion of said charge (10).

REFERENCES:
patent: 2322244 (1943-06-01), Lockhart
patent: 4089334 (1978-05-01), Schwebel et al.
patent: 5899880 (1999-05-01), Bellhouse et al.
patent: 0 755 689 (1997-01-01), None
patent: 0 821 195 (1998-01-01), None
patent: WO 94/24263 (1994-10-01), None

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