Retractable hypodermic syringe

Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...

Reexamination Certificate

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Reexamination Certificate

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07393343

ABSTRACT:
A hypodermic syringe includes a barrel with a plunger slidably extending therein. The plunger includes an outer plunger element and an inner plunger element telescoping together. A plunger cap may be advanced after injection to rotate the plunger. A resistance lock retains the cap and plunger indexed until actuation. The rotation actuates latches and locking fingers on the luer hub to engage a probe axially and rotationally on the seal end of the plunger and disengage the slots in the barrel, respectively. The rotation disengages the seal stop to release the annular seal and finally releases the engagement between the outer plunger element and inner plunger element. The foregoing provides for the retraction of the luer hub and associated needle into the barrel.

REFERENCES:
patent: 4957490 (1990-09-01), Byrne et al.
patent: 5211628 (1993-05-01), Marshall
patent: 5484421 (1996-01-01), Smocer
patent: 5693023 (1997-12-01), Adams
patent: 5782804 (1998-07-01), McMahon
patent: 5997511 (1999-12-01), Curie et al.
patent: 6050977 (2000-04-01), Adams
patent: 6409701 (2002-06-01), Cohn et al.
patent: 6676641 (2004-01-01), Woodard et al.
patent: 2003/0065287 (2003-04-01), Spohn et al.
patent: WO 01/41843 (2001-06-01), None
patent: WO 02/066097 (2002-08-01), None
U.S. Appl. No. 10/450,573, filed Jan. 7, 2002 to Field et al.
U.S. Appl. No. 10/247,781, filed Sep. 16, 2002 to Montalvo et al.
U.S. Appl. No. 10/345,901, filed Jan. 16, 2003 to Campbell et al.

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