Pen needle assembly

Patent metadata

Field	Value
Publication number	US-11207472-B2
Application number	US-201616073709-A
Country	US
Kind code	B2
Filing date	Apr 14, 2016
Priority date	Dec 4, 2014
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

A needle hub assembly for a pen needle includes a needle hub, an inner shield and an outer cover. The open end of the outer cover is closed by a removable seal to access the needle hub. The needle hub has a body with a shoulder and a tower extending from the body for supporting a cannula. The inner shield fits over the tower and the cannula and includes a flange that has an outer dimension complementing the outer dimension of the needle hub and contacts the shoulder of the needle hub in the assembled condition. The outer cover encloses the needle hub and the inner shield and includes a stop member on an inner surface that contacts the flange of the inner shield to capture the inner shield between the shoulder of the needle hub and the outer cover.

First claim

What is claimed is:

1. A pen needle assembly comprising:
a needle hub having an open end for coupling with a delivery pen for delivering a medication, a distal end opposite said open end, and a cannula extending from said distal end;
an inner shield having a body with an open end for coupling to said needle hub; and
an outer cover having a body with an open end for coupling to the needle hub, an upper section extending from said body of said outer cover and having an outer surface with an external gripping surface, a plurality of detents projecting inwardly from an inner surface of said body of said outer cover and oriented for mating with an outer surface of said needle hub, and a plurality of spaced apart stop members projecting inwardly from a respective detent and oriented to contact said inner shield when said outer cover is positioned on said needle hub.

2. The pen needle assembly of claim 1 , wherein said needle hub comprises;
a body having a sidewall with an outer surface having a plurality of recesses at an upper end of said side wall oriented for mating with a respective detent on said outer cover, an inner surface defining a first inner dimension for mating with the delivery pen, and a recess formed on said inner surface at said open end; and
a tower extending from said body of said needle hub and having a sidewall spaced inwardly from said side wall of said body of said needle hub, and an end wall defining a skin contact surface, and where said cannula extends from said end wall.

3. The pen needle assembly of claim 2 , wherein
said end wall of said tower has an inner surface with at least one radially extending strengthening rib.

4. The pen needle assembly of claim 1 , wherein
said inner shield has a top wall at a top end of said body of said inner shield, and
a top end portion extending from said top wall of said inner shield and having an inner dimension less than an inner dimension of said body of said inner shield, said top end portion having an outer surface with a textured portion to define a gripping surface.

5. The pen needle assembly of claim 4 , wherein said textured portion is defined by a plurality of projecting members.

6. The pen needle assembly of claim 4 , wherein
said body of said inner shield has at least one internal rib extending in an axial direction with respect to said inner shield.

7. The pen needle assembly of claim 1 , wherein said inner cover has a flange extending radially outward from a proximal end of said inner cover, and said stop members on the inner surface of said body oriented to contact said flange of said inner shield when said outer cover is positioned on said needle hub.

8. A pen needle assembly of claim 1 , wherein
said needle hub has a body having a sidewall with an outer surface with an outer dimension, and an inner surface, said outer surface having a plurality of recesses extending from a top end of said side wall and extending toward said open end, a bottom end of said side wall having a thickness less than a thickness of said top end of said side wall;
a tower extending from said body of said needle hub and having a sidewall with an outer surface, an inner surface, and said tower having an outer dimension less than said outer dimension of said body, and an end wall defining a skin contact surface; and
a post extending from an inner surface of said end wall of said tower and extending toward said open end of said body, said post configured for supporting a cannula extending from said end wall of said tower.

9. The pen needle assembly of claim 8 , wherein
said bottom end of said inner surface of said side wall of said body of said needle hub includes a recess extending around said open end to define a substantially uniform thickness at said bottom end.

10. The pen needle assembly of claim 8 , wherein
said end wall of said tower has an inner surface with a plurality of ribs projecting into a cavity of said needle hub and extending between said side wall of said tower and said post.

11. The pen needle assembly of claim 10 , wherein
said post has a conical base portion at said inner surface of said end wall, and where said plurality of ribs are formed at least partially on said conical base portion.

12. The pen needle assembly of claim 10 , wherein
said outer face of said end wall of said tower includes an outer ring at an outer edge of said end wall and having an axial face that is inclined with respect to a center axis of said needle hub, and an inner ring at the center portion of said end wall and having an axial face spaced outwardly from said outer ring with respect to the center axis, said inner ring and said outer ring defining a skin contact surface and defining a recess between said inner ring and outer ring.

13. The pen needle assembly of claim 1 , wherein
said stop members are integrally formed with a respective detent and have an axial face to contact said inner shield, and where said stop member are formed at a distal end of the respective detent.

14. The pen needle assembly of claim 13 , wherein
said inner shield has an outwardly extending flange having an outer dimension complementing an outer dimension of the needle hub and where said axial face of said stop member contacts a top surface of said flange.

15. The pen needle assembly of claim 1 , wherein
said inner shield has an upper section with a plurality of substantially flat outer side surfaces converging to a distal end and having a plurality of projecting members extending outwardly from said side surface gripping surface.

16. The pen needle assembly of claim 1 , wherein
said inner shield has a top end portion with at least two opposite facing, substantially flat side surfaces, each of said side surfaces having a plurality of grip members forming a gripping surface for gripping by a user.

17. The pen needle assembly of claim 16 , wherein
said grip members have an outer surface that is inclined with respect to a center axis of said inner shield.

18. The pen needle assembly of claim 16 , wherein
said body of said inner shield has an outwardly extending flange having an outer dimension complementing an inner dimension of said body of said outer cover, and where said top end portion of said inner shield has a substantially square cross-section.

19. The pen needle assembly of claim 16 , wherein
said top end portion of said inner shield is tapered to define a substantially conical shape, and where an inner surface has at least one inwardly projecting rib extending an axial direction with respect to the center axis of said inner shield, each said rib having an inwardly extending lip at a distal end of said rib oriented for contacting an axial facing surface of said needle hub.

Assignees

• Becton Dickinson Co

Inventors

• Rini Christopher
• Klug Richard
• Pettis Ronald
• Huang David
• Marigowda Shresta
• Sack Todd
• Bowen Mark
• Zuschlag Matthew
• Schiff David

Classifications

• A61M2005/3201

  Coaxially assembled needle cannulas placed on top of another, e.g. needles having different diameters · CPC title

• A61M2005/3114

  Filling or refilling · CPC title

• A61M5/32

  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 title

• A61M5/31

  Details · CPC title

• A61M5/178 Primary

  Syringes · CPC title