5mm injection needle

• US 6,200,296 B1
• Filed: 06/05/1997
• Issued: 03/13/2001
• Est. Priority Date: 09/26/1996
• Status: Expired due to Term

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: West, Robert E., Dibiasi, Michael A.
• Primary Examiner(s): Yasko, John D.
• Application Number:
  US08/869,612
• Time in Patent Office: 1,377 Days
• Field of Search: 604/272, 604/187, 604/117, 604/232, 604/192, 604/263
• US Class Current: 604/272
• CPC Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: A61M 5/347 rotatable, e.g. bayonet or screw A61M5/344 takes precedence
• CPC Class Codes: A61M 5/348 snap lock, i.e. upon axial displacement of needle assembly A61M5/344 takes precedence
• CPC Class Codes: A61M 5/42 having means for desensitising skin, for protruding skin to facilitate piercing, or for locating point where body is to be pierced

Abstract

A needle assembly for a medication delivery pen or hypodermic syringe having a usable length of 5 mm (0.197″) that delivers a dose of medication to a proper location in the tissue “strata” or subcontinuous layer without the need for the user or patient to “pinch-up” the skin layer during the injection.

Claims

1. A needle assembly comprising:

a needle hub; and

a 31 gauge needle cannula mounted in said needle hub, said cannula having a distal tip and a usable length between said needle hub and said distal tip of 0.197 inches so to deliver a dose of medication to a proper location in a tissue without the need for a user to pinch-up a skin layer during the injection.

2. A needle assembly according to claim 1, wherein said cannula has an outer diameter less than 0.0105 inches.

3. A needle assembly according to claim 1, wherein said cannula has an outer diameter no smaller than 0.010 inches and no larger than 0.0105 inches.

4. A needle assembly according to claim 1, wherein said cannula has an inner diameter no smaller than 0.0045 inches and no larger than 0.006 inches.

5. A needle assembly according to claim 1, wherein said cannula is made of stainless steel.

6. A needle assembly according to claim 1, wherein said cannula has a wall thickness no smaller than 0.00225 inches and no larger than 0.00275 inches.

7. A hypodermic syringe comprising:

a housing having a distal end;

a plunger slidably mounted within said housing; and

a needle assembly mounted on said distal end of said housing, said needle assembly comprising;

a needle hub; and

a 31 gauge needle cannula mounted in said needle hub, said cannula having a distal tip and a usable length between said needle hub and said distal tip of 0.197 inches so to deliver a dose of medication to a proper location in a tissue without the need for a user to pinch-up a skin layer during the injection.

8. A needle assembly according to claim 7, wherein said needle assembly is permanently mounted on said housing.

9. A needle assembly according to claim 7, wherein said needle assembly is removably mounted to said housing.

10. A pen needle assembly for use with a medication delivery pen, said pen needle assembly comprising:

a needle hub for mounting said pen needle on a medication delivery pen; and

a 31 gauge needle cannula mounted in said needle hub and having a proximal tip, a distal tip, and a usable length between said needle hub and said distal tip of 0.197 inches so to deliver a dose of medication to a proper location in a tissue without the need for a user to pinch-up a skin layer during the injection.