Single-use hypodermic syringe

Details Single-use hypodermic syringe Single-use hypodermic syringe

1995-06-05

1996-10-29

McDermott, Corrine M.

Surgery

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

Treating material introduced into or removed from body...

604110, 128919, A61M 532

Patent

active

055692117

ABSTRACT:
A single-use hypodermic syringe has barrel (10) and needle holder (20) with a needle receiving passage. The needle holder is detachably mounted in the barrel and defines annular space (30) with the barrel communicating with the needle receiving passage. Piston (32) is mounted in annular space (30) and piston rod (38) is connected to the piston with an amount of lost motion. Needle holder (20) is connectable to the piston rod by means of elastically mounted projection (26) engageable with projection (50) of the piston rod. The amount of the lost motion is greater than the total of the axial lengths of projections (26, 50) of piston rod (38) and needle holder (20).

REFERENCES:
patent: 5125908 (1992-06-01), Cohen
patent: 5380286 (1995-01-01), van den Haak
patent: 5401249 (1995-03-01), Shields

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