Safety non-coring needle

• US 20060041234A1
• Filed: 11/17/2004
• Published: 02/23/2006
• Est. Priority Date: 08/23/2004
• Status: Active Grant

• Current Assignee: Hsien-Tsung Wang
• Original Assignee: Hsien-Tsung Wang
• Inventors: Wang, Hsien-Tsung
• Granted Patent: US 7,229,434 B2
• Time in Patent Office: Days
• US Class Current: 604/263
• CPC Class Codes: A61M 2005/1581 Right-angle needle-type devices
• CPC Class Codes: A61M 2205/195 by the needle tip shape
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• CPC Class Codes: A61M 5/3216 Caps placed transversally onto the needle, e.g. pivotally attached to the needle base
• CPC Class Codes: A61M 5/3272 having projections following labyrinth paths

Abstract

Provided is a non-coring needle for venous access implantatable port. In one embodiment the non-coring needle comprises a puncturing assembly comprising two wings having a central sleeve, an L-shaped needle coupled to the sleeve, the needle including an annular groove or enlargement on its bent portion, and a plastic tubing coupled to the sleeve; and a syringe barrel comprising an internal chamber having a forward opening, and an elongate slot formed on the syringe barrel and being in communication with the chamber. The groove or enlargement is located at a first dent of the slot when the needle is concealed in the chamber in a non-use position, the groove or enlargement is located at a forward second dent of the slot when the needle is fully extended from the opening for use, and the groove or enlargement is permanently locked at a rear triangular recess of the slot when the needle is fully retracted into the chamber.

Claims

1. A non-coring needle for a venous access implantatable port comprising:

a puncturing assembly comprising two wings having a central sleeve, a bent needle having its one portion fastened in the central sleeve, the bent needle including an annular groove on its one portion proximate one end of the central sleeve, and a plastic tubing coupled to the other end of the central sleeve for conveying fluid; and

a hollow syringe barrel comprising an internal chamber having a forward opening, and an elongate slot formed on an outer surface of the syringe barrel and being in communication with the internal chamber, the elongate slot including a first, a second, and a third positioning points,

wherein the groove is located at the first positioning point when the needle is concealed in the chamber in a non-use position, the groove is located at the second positioning point when the needle is fully extended from the opening for use, and the groove is locked at the third positioning point when the needle is fully retracted into the chamber.

2. The non-coring needle of claim 1, wherein the needle has a substantially L shape.

3. The non-coring needle of claim 1, wherein the first positioning point is a first dent.

4. The non-coring needle of claim 1, wherein the second positioning point is a second dent.

5. The non-coring needle of claim 1, wherein the third positioning point is a triangular locking recess.

6. The non-coring needle of claim 5, wherein the triangular locking recess is formed by a slim locking member extending from the first positioning point and the slope toward a rear of the elongate slot such that the slim locking member will be deformed when the groove is passed therethrough and the needle with the groove is adapted to be permanently locked into the triangular locking recess once entering from the slim locking member.

7. A non-coring needle for a venous access implantatable port comprising:

a puncturing assembly comprising two wings having a central sleeve having an enlargement at one end, an L-shaped needle having a bent portion inserted into the enlargement and fastened therein, and a plastic tubing coupled to the other end of the sleeve for conveying fluid; and

a hollow syringe barrel comprising an internal chamber having a forward opening, an elongate open slot formed on the syringe barrel and being in communication with the chamber, the slot including first and second positioning points and a forward opening, a first fastening member formed on the opening of the slot and being in communication therewith,

wherein the enlargement is located at the first positioning point when the needle is concealed in the chamber in a non-use position, prior to using the needle pushing the needle forward from the first positioning point until being stopped by the fastening member, turning the wings clockwise about 90 degrees to snap a rear portion of the needle into the first fastening member with the enlargement urged thereagainst, and after using, returning the enlargement to the first positioning point then to the second positioning point and locked at the second positioning point when the needle is fully retracted into the chamber.

8. The non-coring needle of claim 7, wherein the first positioning point is a first dent.

9. The non-coring needle of claim 7, wherein the second positioning point is a triangular recess such that the needle is adapted to permanently lock therein once entering.

10. The non-coring needle of claim 7, wherein the first fastening member has a substantially L shape and comprises a recess at one portion proximate the opening of the slot, the recess being adapted to receive and fasten the rear portion of the needle, and a bifurcation at the other portion of the first fastening member, the bifurcation being adapted to receive and fasten the bent portion of the needle.

11. The non-coring needle of claim 7, further comprising a second fastening member formed on a rear of the hollow syringe barrel.

12. The non-coring needle of claim 11, wherein the second fastening member is shaped as a bifurcation and comprises a bottom cylinder, the cylinder being adapted to receive and fasten the tubing.

13. The non-coring needle of claim 9, wherein the triangular locking recess is formed by a slim locking member extending from the first positioning point and the slope toward a rear of the elongate slot such that the slim locking member will be deformed when the enlargement is passed therethrough and the needle with the enlargement is adapted to be permanently locked into the triangular locking recess once entering from the slim locking member.