Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Reexamination Certificate
2007-06-05
2007-06-05
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
11330374
ABSTRACT:
A disposable syringe incapable of re-use comprising a plunger itself comprising an elongated stem, a disk called a “spider” held near the lower end of the stem. The plunger furthermore comprises a stem extension in the shape of a short cylinder, affixed to the lower face of the spider. Finally the plunger comprises a handle affixed to the upper end of the stem. In addition, the syringe comprises a lower seal and upper seal both of cylindrical annular shape made of rubbery material, having their external cylindrical surface forming an air-tight fit with the inner wall of the barrel. The internal cylindrical surface of the lower seal forms a liquid-tight slip fit with the stem extension. The upper seal's internal diameter is larger than the stem thus forming a gap between itself and the stem, this gap allowing fluid to circulate freely. In addition, the upper seal forms an air-tight combination with the spider when they are in contact. In the syringe's initial operational state, the lower seal, the plunger and the upper seal are located at the bottom of the barrel. As the syringe reaches its final state, it becomes unusable for any subsequent use because the lower seal cannot be drawn upward and the upper seal is abandoned and remains at the top of the barrel.
REFERENCES:
patent: 4713056 (1987-12-01), Butterfield
patent: 4973309 (1990-11-01), Sultan
patent: 5078686 (1992-01-01), Bates
patent: 5135512 (1992-08-01), Mazurik et al.
patent: 5226882 (1993-07-01), Bates
patent: 5242416 (1993-09-01), Hutson
patent: 5259841 (1993-11-01), Hohendorf et al.
patent: 5554122 (1996-09-01), Emanuel
patent: 5891098 (1999-04-01), Huang
patent: 6077245 (2000-06-01), Heinrich et al.
patent: 6322540 (2001-11-01), Grabis et al.
patent: 2002/0035350 (2002-03-01), Turnbull et al.
patent: 2005/0096601 (2005-05-01), Doyle
LandOfFree
Low-cost non-reusable and anti-needlestick enhancements to... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low-cost non-reusable and anti-needlestick enhancements to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-cost non-reusable and anti-needlestick enhancements to... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3846942