Dispenser for medicaments and method and apparatus for...

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

Reexamination Certificate

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Reexamination Certificate

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07070581

ABSTRACT:
A dispenser assembly for liquid products comprising an elongated, generally cylindrical barrel of a predetermined internal cross-sectional diameter having a discharge opening at one end and open at its opposite end, an elongated, generally cylindrical hollow plunger having an outer diameter less than the barrel internal diameter and a circumferentially extending axially directed sealing lip adjacent the tip portion having an outer diameter greater than the internal diameter of the barrel in the relaxed state to thereby flex the lip inwardly against its bias and providing the sole sliding contact between the plunger and barrel when the plunger and barrel are actuated axially relative to one another.

REFERENCES:
patent: 4201209 (1980-05-01), LeVeen et al.
patent: 4704105 (1987-11-01), Adorjan et al.
patent: 5037382 (1991-08-01), Kvorning et al.
patent: 5411489 (1995-05-01), Pagay et al.
patent: 5735825 (1998-04-01), Stevens et al.
patent: 5935104 (1999-08-01), Janek et al.
patent: 6224577 (2001-05-01), Dedola et al.

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