Nonreusable syringe

Details Nonreusable syringe Nonreusable syringe

1991-04-03

1992-06-09

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604195, A61M 500

Patent

active

051203103

ABSTRACT:
A nonreusable syringe is provided having an automatically retracting hypodermic needle to prevent accidental injury after injection or undesirable reuse of the syringe. The needle is retracted by a spring located behind the syringe piston and disposed to prevent reextension of the needle after use. A locking mechanism holds the needle in position for injection. The piston includes means to release the locking mechanism as injection is completed to automatically retract the needle into the syringe. The syringe tip seal is not in frictional contact with the needle, eliminating drag on the needle during retraction.

REFERENCES:
patent: 4838869 (1989-06-01), Allard
patent: 4874382 (1989-10-01), Lindemann et al.
patent: 4904242 (1990-02-01), Kulli
patent: 4932940 (1990-06-01), Walker et al.
patent: 4955870 (1990-09-01), Ridderheim et al.
patent: 5007903 (1991-04-01), Ellard

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