Hypodermic syringe

Details Hypodermic syringe Hypodermic syringe

1990-07-24

1992-08-18

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

604232, 215307, 220204, A61M 524

Patent

active

051394901

ABSTRACT:
A hypodermic-syringe assembly comprises a hard tubular body centered on an axis and having an axial front end formed with a radially inwardly projecting annular ridge and an axial rear end, a piston axially slidable in the body and normally adjacent the rear end, and a soft plug fitted in the front end in tight engagement with the ridge. The plug is formed with an axially rearwardly open blind passage having a front floor, and a front face defining with the passage floor a relatively thin membrane. Thus a needle can be poked through the membrane.

REFERENCES:
patent: 1734154 (1929-11-01), Brown
patent: 2102704 (1937-12-01), Hein
patent: 2483825 (1949-10-01), Goldberg
patent: 2526365 (1950-10-01), Jorgenson
patent: 2531893 (1950-11-01), Roehr
patent: 3757779 (1973-09-01), Rovinski
patent: 3811441 (1975-05-01), Sarnoff
patent: 4193402 (1980-03-01), Rumpler
patent: 4435176 (1984-03-01), Ishikawa
patent: 4781701 (1988-11-01), Geprags
patent: 5084040 (1992-01-01), Sutter

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