Disposable safety syringe which leaves no residual injection

• US 20020107489A1
• Filed: 03/26/2001
• Published: 08/08/2002
• Est. Priority Date: 02/03/2001
• Status: Active Grant

• Current Assignee: Choon-Bal Lee
• Original Assignee: Choon-Bal Lee
• Inventors: Lee, Choon-Bal
• Granted Patent: US 6,616,636 B2
• Time in Patent Office: Days
• US Class Current: 604/240
• CPC Class Codes: A61M 2005/3121 via the proximal end of a syringe, i.e. syringe end opposite to needle cannula mounting end
• CPC Class Codes: A61M 2005/31516 reducing dead-space in the syringe barrel after delivery
• CPC Class Codes: A61M 2005/3253 disconnecting the needle hub from the syringe barrel during removal of the sleeve from the syringe barrel
• CPC Class Codes: A61M 5/3243 being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel devices for protecting guide needles in combination with catheters A61M25/0612

Abstract

The present invention relates to a one-time use disposable safety syringe, which will not leave any remnant of an injection behind and facilitate disposal of needles with safety after use, and more particularly to a disposable safety syringe, which consists of a barrel, a needle-setup tube to be connected by a connecting tip for a needle-setup tube at the upper end of said barrel, a syringe plunger to be inserted in said barrel to push the syringe, and a needle protective barrel, and which can, by means of making a packing protrusion formed on a injection packing at the upper end of said syringe plunger come into close contact with a residual-preventing outlet to prevent remaining of the injection solution, said hole being connected with the rear of said needle of said needle-setup tube, facilitate injection of the whole quantity of an injection, and which does, by allowing easily to separate the needle-setup tube with the needle securely inside from said barrel, make it possible to dispose of a used needle with safety, whereby it precludes reuse a needle, thus defending both medical personnel and disposers of used needles against infection via blood from AIDS, hepatitis, or other fatal diseases caused by pathogenic bacteria by inadvertently getting pricked by such used needles.

Claims

1. A disposable safety syringe, which leaves no residual injection, comprising:

(a) a syringe barrel, which comprises a connecting tip for a needle-setup tube, at the upper end thereof;

an injection outlet passing through the center thereof;

a barrel finger flange and then a rear-cap connector for maintaining sterility, at the lower end thereof; and

a protrusion for cutting off loss of injection, which is slanted toward the upper end, around the inner girth of the lower end thereof;

(b) a needle-setup tube, to be connected to the connecting tip for a needle-setup tube of said syringe barrel, wherein said needle-setup tube comprises a syringe needle connected to the upper end thereof;

a residual-preventing outlet connected to the rear side of said syringe needle and a needle hub at the lower end thereof,

(c) a syringe plunger, which comprises an injection packing connected at the upper end thereof;

a syringe thumb rest at the lower end thereof, to be inserted into the syringe barrel;

a packing protrusion at the upper part of said injection packing, which is in contact with the surface of the residual-preventing outlet of the needle-setup tube; and

a protrusion for preventing loss of injection formed around the girth of the lower end of said injection packing; and

(d) a needle protective barrel, placed outside of the syringe barrel, which comprises a disposable-cap connector, and then a detachment handle at the upper end thereof.

2. The disposable safety syringe, which leaves no residual injection, according to claim 1, which comprises a rear cap for maintaining sterility, connected to the rear-cap connector for maintaining sterility of said syringe barrel.

3. The disposable safety syringe, which leaves no residual injection, according to claim 1, which comprises a disposable cap, connected to the disposable-cap connector of said needle protective barrel.

4. The disposable safety syringe, which leaves no residual injection, according to claim 1, which comprises a protective cap for a syringe needle connected to said needle-setup tube.

5. The disposable safety syringe, which leaves no residual injection, according to claim 2 or 4, which comprises a multiple of sterility-maintenance rings, formed vertically side by side, around the girth of inner side of the lower end of said protective cap 6 for a syringe needle, and said rear cap for maintaining sterility, respectively.

6. The disposable safety syringe, which leaves no residual injection, according to claim 1, wherein said needle protective barrel comprises a connecting thread for a needle hub around the inner surface at the upper end thereof;

a protrusion for catching onto a needle hub formed around the girth of the lower end thereof; and

a protrusion for stopping regression of a needle hub, slanting downward, at the inner side of said protrusion for catching onto a needle hub.