Self-locking safety disposable syringe with needle...

Details Self-locking safety disposable syringe with needle... Self-locking safety disposable syringe with needle...

2007-09-11

2007-09-11

DeSanto, Matthew F. (Department: 3763)

Surgery

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

Treating material introduced into or removed from body...

Reexamination Certificate

active

10988696

ABSTRACT:
The invention refers to the field of self-locking safety disposable syringes with needle protection after use. The syringe comprises a hollow barrel (1) ending on its lower side with an internal seat (2) adapted to receive a hub (3) carrying a cannula (4). A hollow driving rod (5) adapted to house a spring (6) is inserted in the hollow barrel. Such rod is closed at its lower end by an extracting element (8) that can slide into the hollow driving rod. The extracting element has an annular notch (9) in which a sealing ring rubber gasket (10) is housed that seals the internal wall of the hollow barrel (1). The extracting element (8) with related sealing ring gasket (10) form a liquid sucking and compressing plunger.

REFERENCES:
patent: 5084029 (1992-01-01), Nacci née Tagliaferri et al.
patent: 5114404 (1992-05-01), Paxton et al.
patent: 5190526 (1993-03-01), Murray et al.
patent: 5222943 (1993-06-01), Mazzara
patent: 5378240 (1995-01-01), Curie et al.
patent: WO 00/18454 (2000-04-01), None

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