Disposable safety needle system and safety enclosure means

• US 8,221,352 B2
• Filed: 01/29/2010
• Issued: 07/17/2012
• Est. Priority Date: 01/29/2009
• Status: Active Grant

• Current Assignee: Michael Merchant
• Original Assignee: Michael Merchant
• Inventors: Merchant, Michael
• Primary Examiner(s): Mehta, Bhisma
• Application Number:
  US12/697,148
• Publication Number:
  US 20110125056A1
• Time in Patent Office: 900 Days
• Field of Search: 604/110, 604/192, 604/198, 604/199, 604/263, 604/268, 604/162, 604/164.08
• US Class Current: 604/110
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• CPC Class Codes: A61B 5/150641 comprising means to impede repositioning of protection sleeve from covering to uncovering position
• CPC Class Codes: A61B 5/15074 Needle sets comprising wings, e.g. butterfly type, for ease of handling
• CPC Class Codes: A61B 5/153 Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
• CPC Class Codes: A61M 5/3202 Devices for protection of the needle before use, e.g. caps A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001
• CPC Class Codes: A61M 5/3213 Caps placed axially onto the needle, e.g. equipped with finger protection guards axially-extensible protective sleeves A61M5/3243
• CPC Class Codes: A61M 5/3273 freely sliding on needle shaft without connection to syringe or needle

Abstract

Techniques disclosed herein include a disposable safety needle assembly and safety enclosure for internally shielding a used or contaminated needle. The needle assembly has a needle cannula slidably disposed within a safety enclosure. The safety enclosure includes an internally disposed flexible safety member. The flexible safety member has face portion transversely situated and having a safety feature disposed to the needle and that slides thereon. Retracting the needle within the safety enclosure to a point wherein the sharp tip of the needle is beyond the needle protection section of the flexible member causes the protection section to travel transversely to the direction of motion of the needle. As a result, the safety feature receives the sharp tip of the needle and prevents the needle from exiting the enclosure, thereby maintaining the needle safely after use.

Claims

1. An apparatus for securing and protecting the tip of a needle, the apparatus comprising:

a needle having a body portion and a diameter and a tip of the needle;

a safety enclosure having an interior space, a first base, a pair of second bases, and a longitudinal axis, the needle being slidably disposed within said interior space of said safety enclosure;

a base portion;

a flexible member having a length, said base portion being flexibly connected to said safety enclosure by said flexible member;

a flexible safety member having a face portion and rear portion, said flexible safety member being disposed substantially longitudinally within said interior space, said face portion being disposed substantially transversely within said interior space;

said face portion including a safety feature sized and dimensioned to receive the tip of the needle;

said safety enclosure having two positions, a use position and a safe position;

said use position in which the tip of the needle extends beyond the interior space of said safety enclosure and said face portion is prevented from transverse movement by the needle;

said safe position in which said safety enclosure is moved such that the tip of the needle is brought into said interior space of said safety enclosure to a safe position where the tip of the needle is brought further into the interior space than said face portion of said flexible safety member, wherein said face portion is able to move transversely and to retain the tip of the needle, wherein the tip of the needle is received by the safety feature;

wherein the safety feature comprises an orifice in said face portion of said flexible safety member that is sized and dimensioned to receive the tip of the needle;

wherein said orifice of said safety feature has a diameter that is less than the diameter of the needle body; and

wherein the flexible safety member is constructed of material that has sufficient strength to prevent the tip of the needle from further expanding said diameter of said orifice of said safety feature.

2. The apparatus of claim 1, further comprising:

a latch that removably couples the safety enclosure to the base portion.

3. The apparatus of claim 1 wherein the safety enclosure is substantially a rectangular parallelepiped in shape, and wherein said rectangular parallelepiped is a rectangular cuboid.

4. The apparatus of claim 1, wherein said safety enclosure is substantially cylindrical in shape.

5. The apparatus of claim 1 wherein said safety enclosure is constructed of a material having sufficient strength to resist being punctured by the tip of the needle.

6. The apparatus of claim 1 further including a piece of hollow tubing having an outer surface, said hollow tubing being mechanically attached to the needle to be in fluid communication with the tip of the needle, said base portion being fixedly disposed about the outer surface of the hollow tubing, and wherein said hollow tubing is flexible.

7. The apparatus of claim 1 further including a piece of hollow tubing having an outer surface, said hollow tubing being bonded to the needle to be in fluid communication with the tip of the needle, said base portion being fixedly disposed about the outer surface of the hollow tubing;

wherein said hollow tubing is flexible.

8. The apparatus of claim 1, wherein the flexible member further comprises a flexible coupling having a predetermined length, the flexible coupling having two ends, one end being coupled to the base portion and the second end being coupled to the safety enclosure;

wherein the flexible coupling comprises first and second flexible tethers, each of said first and second flexible tethers being coupled between the base portion and the safety enclosure.

9. The apparatus of claim 1, wherein the flexible safety member has a bendable portion, and first and second notches, wherein said rear portion is firmly attached to the safety enclosure, wherein said first and second notches are sized and configured to receive said pair of second bases, wherein said bendable portion biases said face portion in a transverse direction.

10. An apparatus for securing and protecting the tip of a needle, the apparatus comprising:

a needle having a body portion and a diameter and a tip of the needle;

a safety enclosure having an interior space, a first base, a pair of second bases, and a longitudinal axis, the needle being slidably disposed within said interior space of said safety enclosure;

a base portion;

a flexible member having a length, said base portion being flexibly connected to said safety enclosure by said flexible member;

a flexible safety member having a face portion and rear portion, said flexible safety member being disposed substantially longitudinally within said interior space, said face portion being disposed substantially transversely within said interior space;

said face portion including a safety feature sized and dimensioned to receive the tip of the needle;

said safety enclosure having two positions, a use position and a safe position;

said use position in which the tip of the needle extends beyond the interior space of said safety enclosure and said face portion is prevented from transverse movement by the needle;

said safe position in which said safety enclosure is moved such that the tip of the needle is brought into said interior space of said safety enclosure to a safe position where the tip of the needle is brought further into the interior space than said face portion of said flexible safety member, wherein said face portion is able to move transversely and to retain the tip of the needle, wherein the tip of the needle is received by the safety feature;

wherein the safety feature comprises an indent in said face portion of said flexible safety member that is sized and dimensioned to receive the tip of the needle;

wherein said indent of said safety feature has a diameter that is less than the diameter of the needle body; and

wherein the flexible safety member is constructed of material that has sufficient strength to prevent the tip of the needle from further expanding said diameter of said indent of said safety feature.

11. An apparatus for securing and protecting a needle tip of a needle cannula, the apparatus comprising:

a needle cannula, the needle cannula being elongated and having a proximal end and a distal end, the distal end having a needle tip that has a tapered point;

a base portion, the base portion attached to the proximal end of the needle cannula;

a safety enclosure slidably disposed around a portion of the needle cannula such that the safety enclosure is enabled to slide along a longitudinal length of the needle cannula from the base portion towards the needle tip, the safety enclosure defining an interior portion;

a flexible safety member disposed within the interior portion of the safety enclosure, the flexible safety member situated along a longitudinal axis of the needle cannula, the flexible safety member having a needle protection section transversely disposed relative to the longitudinal axis of the needle cannula such that the flexible safety member cooperatively slides on the needle cannula when the safety enclosure slides along the needle cannula, the needle protection section defining a perforation having a perforation diameter, the perforation diameter being sized sufficient to receive and retain at least a portion of the needle tip, the perforation diameter also being sized less than a diameter of the needle cannula; and

an extensible retainer that connects the safety enclosure to the base portion, the extensible retainer configured such that the extensible retainer permits the safety enclosure to slide along the needle cannula a distance sufficient for the needle protection section of the flexible safety member to pass beyond the needle tip such that the needle protection section travels transversely to the longitudinal axis of the needle cannula and receives the needle tip in the defined perforation, the extensible retainer also configured to prevent the safety enclosure from moving entirely beyond the needle tip.

12. The apparatus of claim 11, further comprising:

a latch that removably couples the safety enclosure to the base portion.

13. The apparatus of claim 12, further comprising:

a pair of flexible wings attached to the safety enclosure that facilitate grasping the safety enclosure.

14. The apparatus of claim 13 wherein the needle cannula is a fistula needle compatible with dialysis use.

15. The apparatus of claim 13 wherein the needle cannula is a blood drawing needle.

16. The apparatus of claim 13, further comprising:

flexible tubing attached to the base portion such that fluids entering the needle cannula via the distal end can continue through the flexible tubing.

17. An apparatus for securing and protecting a needle tip of a needle cannula, the apparatus comprising:

a needle cannula, the needle cannula being elongated and having a proximal end and a distal end, the distal end having a needle tip that has a tapered point;

a base portion, the base portion attached to the proximal end of the needle cannula;

a safety enclosure slidably disposed around a portion of the needle cannula such that the safety enclosure is enabled to slide along a longitudinal length of the needle cannula from the base portion towards the needle tip, the safety enclosure defining an interior portion;

a flexible safety member disposed within the interior portion of the safety enclosure, the flexible safety member situated along a longitudinal axis of the needle cannula, the flexible safety member having a needle protection section transversely disposed relative to the longitudinal axis of the needle cannula such that the flexible safety member cooperatively slides on the needle cannula when the safety enclosure slides along the needle cannula, the needle protection section defining a detent, the detent being sized sufficient to receive and retain at least a portion of the needle tip without permitting passage of the needle cannula entirely through the needle protection section, wherein the detent of the needle protection section has a diameter that is less than a diameter of the needle cannula, wherein the needle protection section is constructed of material that has sufficient strength to prevent the tip of the needle cannula from further expanding the diameter of the detent of the needle protection section; and

an extensible retainer that connects the safety enclosure to the base portion, the extensible retainer configured to extend to permit the safety enclosure to slide along the needle cannula a distance sufficient for the needle protection section of the flexible safety member to pass beyond the needle tip such that the needle protection section travels transversely to the longitudinal axis of the needle cannula and receives the needle tip in the defined detent, the extensible retainer also configured to prevent the safety enclosure from moving entirely beyond the needle tip.

18. The apparatus of claim 17, further comprising:

a latch that removably couples the safety enclosure to the base portion.

19. The apparatus of claim 18, further comprising:

a pair of flexible wings attached to the safety enclosure that facilitate grasping the safety enclosure.

20. The apparatus of claim 19, further comprising:

flexible tubing attached to the base portion such that fluids entering the needle cannula via the distal end can continue through the flexible tubing.