Needleless syringe functioning by shock-tube effect, with...

Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...

Reexamination Certificate

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C604S068000, C604S140000

Reexamination Certificate

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06911015

ABSTRACT:
The invention concerns a needleless syringe (1) comprising a trigger, a gas generator (2) prolonged by a gas expansion chamber (3), a system for retaining particles and an ejection tube (4). The invention is characterised in that the particles are housed outside the ejection tube conduit (4) and the gases cause the particles to reach inside said tube (4) by displacing a plunger (13), prior to speeding them up by wave shock inside the tube (4).

REFERENCES:
patent: 3763859 (1973-10-01), Yanof et al.
patent: 3788315 (1974-01-01), Laurens
patent: 4089334 (1978-05-01), Schwebel et al.
patent: 4338980 (1982-07-01), Schwebel et al.
patent: 5478744 (1995-12-01), Sanford et al.
patent: 5865796 (1999-02-01), McCabe
patent: WO 94/24263 (1984-04-01), None
patent: WO 94/24263 (1994-10-01), None
patent: WO 99/01169 (1999-01-01), None

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