Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Reexamination Certificate
2001-12-12
2003-12-16
Kennedy, Sharon (Department: 3762)
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
C604S228000
Reexamination Certificate
active
06663593
ABSTRACT:
FIELD OF THE INVENTION
Disposable syringes: syringes that were supposed to be discarded after their use. Unfortunately, those syringes are being re-used, as proven by the statistics. About 25% of AIDS cases are directly attributable to disposable syringes.
BACKGROUND
There are several brands and models of syringes available in the market. However, no model is really disposable. They are only designed with the objective of guaranteeing the quality and sterility of the product. Therefore, it is of extreme importance that measures be taken so that these syringes can really be discarded, avoiding the burden of additional expenses to the health system due to their re-use. The warnings “To be used only once” or “To be destroyed after use!” printed in the packing don't guarantee that the product will be discarded. There are no secure ways of supervising the final user of the product. If each sold unit were really destroyed after its use, the cost with syringes would be ridiculous, when compared with the economy generated by the reduction of the health expenses attributable to the sharing of disposable syringes.
SUMMARY OF THE INVENTION
The present invention is about a “Disposable Syringe with a plunger rupture device” or, more accurately, about a device of automatic action which permits the syringe to be used only once. The syringe is characterized by a device that allows the charging of fluids as in any common syringe; however, when the piston has its course reversed, the pressure that the user exercises in the plunger, and, consequently, in the piston, receives a contrary pressure from the fluid. At this point, the device is triggered: the rubber suffers a deformation, expelling the support bolt from the set plunger/piston. This make the claws at the plunger lose their grip and the piston detaches itself from the plunger, getting stuck at the bottom of the barrel, making impossible a second use of the syringe.
REFERENCES:
patent: 4144885 (1979-03-01), Stait
patent: 4973308 (1990-11-01), Borras et al.
patent: 4973309 (1990-11-01), Sultan
patent: 5181912 (1993-01-01), Hammett
patent: 5215524 (1993-06-01), Vallelunga et al.
patent: 5226882 (1993-07-01), Bates
patent: 5352203 (1994-10-01), Vallelunga et al.
patent: 5478314 (1995-12-01), Malenchek
patent: 5643211 (1997-07-01), Sadowski et al.
patent: 5722951 (1998-03-01), Marano
patent: 5738655 (1998-04-01), Vallelunga et al.
patent: 5928202 (1999-07-01), Linnebjerg
patent: 6409704 (2002-06-01), Tsai
patent: 2002/0035350 (2002-03-01), Turnbull et al.
Kennedy Sharon
Oliver Milton
Ware Fressola Van Der Sluys & Adolphson LLC
LandOfFree
Disposable syringe with plunger rupture does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Disposable syringe with plunger rupture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disposable syringe with plunger rupture will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3179741