Hypodermic syringe

• US 4,266,544 A
• Filed: 11/09/1979
• Issued: 05/12/1981
• Est. Priority Date: 11/09/1979
• Status: Expired due to Term

• Current Assignee: Jons William Warren, Richard Enoch Kaufman, Robert A. Levine
• Original Assignee: Jons William Warren
• Inventors: Wardlaw, Stephen C.
• Primary Examiner(s): Yasko, John D.
• Application Number:
  US06/093,134
• Time in Patent Office: 550 Days
• Field of Search: 128/218 R, 128/218 N, 128/218 F, 128/215, 128/216, 128/213, 128/221
• US Class Current: 604/110
• CPC Class Codes: A61M 2005/3282 using mechanical means, e.g. mills
• CPC Class Codes: A61M 2005/3284 Deformaton of needle by deflection or bending
• CPC Class Codes: A61M 5/3278 Apparatus for destroying used needles or syringes needle resheathing means destroying the needle A61M5/321
• CPC Class Codes: A61M 5/50 having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile retractable needles or needle protectors with means for preventing re-use A61M5/321

Abstract

A hypodermic syringe which has provisions for preventing more than one use thereof and rendering the needle inoperative and harmless. A device is mounted on the syringe which, after administering an injection, is manipulated to bend the needle portion of the syringe and concurrently retract the needle from its normally projecting position whereby the needle cannot accidentally cause injury to anyone.

Claims

1. An improved disposable syringe adapted to be used but once, said syringe comprising:

(a) a hollow tubular portion for containing a medicament dose, and a hypodermic needle secured to one end of said tubular portion and projecting therefrom;

(b) means in said hollow tubular portion for pumping a dose of medicament therefrom through said needle; and

(c) retracting means movably mounted on said housing, said retracting means being operable to engage said needle and bend the latter to pull said needle from its projecting position to a safe position wherein said needle is covered over by a portion of said syringe.

2. An improved disposable syringe adapted to be used but once, said syringe comprising:

(a) a hollow tubular portion for a medicament dose, and a hypodermic needle disposed on one end of said tubular portion projecting therefrom;

(b) means in said housing for pumping a dose of medicament therefrom through said needle; and

(c) a retracting member movably mounted on said housing, said retracting member being disposed on said housing in a position wherein said needle projects therethrough, and said retracting member being movable laterally across said needle to engage said needle and bend said needle and pull the latter to a safe position wherein said needle is covered by a portion of said syringe.

3. An improved disposable syringe adapted to be used but once, said syringe comprising:

(a) a hollow tubular portion for containing a dose of medicament, and a hypodermic needle, said needle being disposed in an operative position projecting from one end of said tubular portion;

(b) means in said tubular portion for pumping a dose of medicament through said needle; and

(c) a disk mounted adjacent to said one end of said tubular portion, said disk being movable across said one end of said tubular portion but being secured to said tubular portion so as not to be readily detachable therefrom, said disk being movable from a first position wherein said needle projects through said disk to a second position wherein said disk moves laterally across said needle to engage the projecting needle and bend the latter thereby retracting the needle out of its projecting position to a safe position wherein said needle is completely covered by a portion of the syringe.

4. An improved disposable syringe adapted to be used but once, said syringe comprising:

(a) a tubular portion for containing a dose of a medicament, and a hypodermic needle, said needle being disposed in an operative position projecting from one end of said tubular portion;

(b) means in said tubular portion for pumping a dose of medicament through said needle; and

(c) a retractor member movably mounted on an external surface of said one end of said tubular member, said retractor member being secured to said one end of said tubular member so as not to be readily removable therefrom, said retractor member being movable from a first position wherein said needle projects through said retractor member to a second position wherein said retractor member moves laterally across said needle to engage and bend the projecting needle until said needle is bent to a safe position wherein said needle is covered by said retractor member.

5. The syringe of claim 4, wherein said retractor member is provided with a through passage which is co-axial with said needle when said retractor member is in said first position, the edge of said passage engaging said projecting needle when said retractor member is moved toward said second position.

6. The syringe of claim 5, wherein said retractor member is a disk mounted on said one end of said housing for rotation about an axis which is radially offset from the axis of said needle.

7. The syringe of claim 6, wherein said disk is provided with an internal chamber into which said through passage opens, said chamber providing means for containing the bent needle.

8. An improved disposable syringe adapted to be used but once, said syringe comprising:

(a) a hollow tubular portion for containing a dose of a medicament, and a hypodermic needle, said needle being mounted on and projecting from one end of said tubular portion, and said tubular portion being formed with a lug, said lug being radially offset from said needle;

(b) means in said tubular portion for pumping a dose of medicament through said needle;

(c) a needle retractor disk mounted on said lug, said retractor disk overlying the majority of said one end of said tubular portion and having a through passage which is co-axial with said needle and through which said needle projects, and said retractor disk being rotatable about said lug whereby said through passage is moved out of alignment with said needle to move said retractor disk against the protruding needle to bend the latter and draw the needle back through said retractor disk through passage to a safe position wherein the bent needle underlies said retractor disk.