Hypodermic syringe

Details Hypodermic syringe Hypodermic syringe

1988-06-24

1989-10-17

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

604 91, 604208, A61M 508

Patent

active

048743810

ABSTRACT:
A two-compartment syringe having a bypass through which the liquid can be forced into the medicament compartment by advance of the piston connected to the stem, has a brake retarding the displacement of this piston until it reaches the bypass to prevent undesired discharge of the injectable substance from the syringe. Once the latter piston has reached the bypass, the stem can be axially displaced independently of a braking action by the damping means for normal injection.

REFERENCES:
patent: 2549417 (1951-04-01), Brown
patent: 2591046 (1952-04-01), Brown
patent: 4226236 (1980-10-01), Genese
patent: 4312343 (1982-01-01), LeVeen et al.
patent: 4583974 (1986-04-01), Kokernak
patent: 4613326 (1986-09-01), Szwarc
patent: 4792329 (1988-12-01), Schreuder

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