Trap in hub chamber safety needle cannula syringe tip

• US 5,891,093 A
• Filed: 12/09/1997
• Issued: 04/06/1999
• Est. Priority Date: 12/09/1997
• Status: Expired due to Fees

• Current Assignee: Edward D. Dysarz
• Original Assignee: Edward D. Dysarz
• Inventors: Dysarz, Edward D.
• Primary Examiner(s): Coggins, Wynn Wood
• Assistant Examiner(s): GRING, NOELLE K
• Application Number:
  US08/987,452
• Time in Patent Office: 483 Days
• Field of Search: 604/272, 604/101, 604/107, 604/192, 604/197, 604/199, 604/239, 604/240, 604/273, 604/263, 604/110
• US Class Current: 604/110
• CPC Class Codes: A61M 2005/3284 Deformaton of needle by deflection or bending
• CPC Class Codes: A61M 5/32 Needles; Details of needles pertaining to their connection with syringe or hub infusion needles A61M5/158; Accessories for bringing the needle into, or holding the needle on, the body A61M5/42, A61M5/46 take precedence; guide needles for catheters A61M25/065; Devices for protection of needles apparatus specially adapted for cleaning or sterilising needles A61M5/001
• CPC Class Codes: A61M 5/3234 Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user

Abstract

A syringe tip device and method wherein a safety chamber is provided at the end of the hub for a slip tip, eccentric tip, or threaded tip syringe. The hub is placed on any conventional syringe in a convention manner; the safety sheath protecting the needle cannula is removed and the syringe is filled with the desired amount of medication wherein the medication is injected into a patient wherein when the process is complete, a button or lever is depressed, releasing an internal biased spring that strikes the needle cannula and bends the needle cannula within the hub chamber until the entire needle cannula is bent and destroyed within the hub chamber thus rendering the needle cannula safe from an accidental needle cannula prick.

Claims

1. A device wherein a needle cannula is fixed to said device and wherein said device is fixed to a syringe wherein said device is used to inject medication into the body of a patient after said device is used said needle cannula is destroyed, comprising;

a hub wherein said hub has a first end and a second end and wherein said second end of said hub is fixed to said first end of said syringe forming a fluid tight connection with said syringe and wherein said hub has a hollow passage inside to allow for the flow of said medication through said hub;

a hub chamber wherein said hub chamber has a first end, a second end a third end, a fourth end and a hollow inside;

a needle cannula with a first end and a second end and wherein said needle cannula is a hollow tube that will transport said medication from said syringe into the flesh of a body and wherein said second end of said needle cannula is fixed to said first end of said hub;

a hub spring wherein said hub spring has a first end and a second end and said hub spring is partly disposed in said hub chamber and said hub spring is biased;

a trigger means wherein said trigger means is comprised of a depressor bar with a first end and a second end, a fulcrum, a pivot pin and a spring stop wherein said spring stop has a first end and a second end and wherein said second end of said spring stop extends into said inside of said hub chamber and further restrains said based hub spring and wherein said first end of said spring stop is fixed to said pivot pin and wherein said pivot pin fixed to said first end of said depressor bar wherein said second end of said depressor bar is depressed thereby causing said depressor bar to rotate about said fulcrum thereby elevating said first end of said depressor bar and further withdrawing said spring stop from said biased hub spring said hub chamber thereby releasing said biased hub spring and further allowing said biased hub spring to rotate freely about said second end of said biased hub spring wherein said biased hub spring further impacts or strikes said needle cannula thereby bending said needle cannula and further pulling said first end of said needle cannula completely into said hub chamber wherein the pointed first end of said needle cannula is inside of said hub chamber and said needle cannula is completely destroyed in said hub chamber wherein said needle cannula may not be reused or accidentally prick another body.

2. The device of claim 1 wherein a needle cannula guide is formed on said first end of said hub chamber.

3. The device of claim 2 wherein said needle cannula guide guides said needle cannula as said needle cannula is being pulled into said hub chamber and further forces said first end of said needle cannula to remain straight as said needle cannula is being bent and withdrawn into said hub chamber.

4. The device of claim 1 wherein said hub is a threaded lock and wherein said hub may be screwed into said first end of said syringe.

5. The device of claim 1 wherein said hub may be a slip on tip.

6. The device of claim 1 wherein said device may be safely removed from said syringe after said device has been used and said needle cannula has been destroyed.

7. The device of claim 1 wherein said biased hub spring is held in place by a spring pin.

8. The device of claim 1 wherein a spring stop ridge is formed in said hub chamber and said spring stop ridge further supports said spring stop from the thrust of said biased spring.

9. The device of claim 1 wherein said trigger means is activated by the press of a finger or thumb.

10. The device of claim 1 wherein said trigger means is activated by tapping said second end of said depressor bar on a corner of a table of any other hard object.