Adjustable penetration depth syringe

Patent metadata

Field	Value
Publication number	US-10688256-B2
Application number	US-201815903474-A
Country	US
Kind code	B2
Filing date	Feb 23, 2018
Priority date	Sep 26, 2013
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A syringe with adjustable penetration depth, comprising a tubular syringe barrel, a plunger positioned within the syringe barrel, a hub bearing a needle and attached to the syringe barrel, a movable collar having an open proximal end received over the hub, a distal end wall having an opening through which the needle protrudes, and a sidewall extending proximally from the distal end wall, the sidewall having an interior surface engaging the hub or syringe barrel, and a retaining feature on the collar engaging the hub or barrel and retaining the collar at a plurality of axial positions. The collar travels with respect to the hub along a path defined by the retaining feature on the interior surface of the sidewall engaging the hub or barrel, exposing a greater length of the needle as the collar travels toward the plunger.

First claim

What is claimed is:

1. A syringe with adjustable penetration depth, comprising:
a tubular syringe barrel;
a plunger positioned within the syringe barrel;
a hub bearing a needle and attached to a distal end of the syringe barrel, the hub being removable from the syringe barrel;
a movable collar having an open proximal end received over the hub, a distal end wall having an opening through which the needle protrudes, and a sidewall extending proximally from the distal end wall, the sidewall having an interior surface engaging the hub; and
a retaining feature on the collar engaging the hub and retaining the collar at a plurality of axial positions; wherein
the collar travels with respect to the hub along a path defined by the retaining feature on the interior surface of the sidewall engaging the hub, exposing a greater length of the needle as the collar travels toward the plunger;
the collar is retained in a fixed position at a first or second axial position;
the collar rotates without axial movement when the retaining feature on the collar is engaged to one of a plurality of slots on the hub; and
the plurality of slots is not visible when the collar contacts the syringe barrel.

2. The syringe according to claim 1 , wherein the hub bearing the needle is snap-fit to the syringe barrel and the syringe is configured to be provided pre-assembled to a user.

3. The syringe according to claim 1 , further comprising indicia on the hub representing a penetration depth of the needle, said indicia being visible through an opening in the sidewall of the collar.

4. The syringe according to claim 1 , wherein the hub includes a plurality of laterally extending protrusions defining the plurality of slots at distinct axial positions on the hub.

5. The syringe according to claim 4 , wherein the retaining feature includes a tab adapted to engage one of the plurality of slots on the hub when the collar is rotated.

6. The syringe according to claim 5 , wherein
at least one of the plurality of slots includes a depression; and
when the tab of the collar engages the depression, the collar is locked from further rotation.

7. The syringe according to claim 6 , wherein the collar is locked at a distal most position on the collar.

8. The syringe according to claim 6 , wherein when the collar is locked, a tactile indication is provided.

9. The syringe according to claim 6 , wherein the collar is prevented from clockwise rotation when locked.

10. The syringe according to claim 4 , wherein the plurality of slots on the hub are spaced at substantially 1 mm increments, providing for the first axial position at which 8 mm of needle length protrudes from the distal end wall of the collar, and the second axial position at which 4 mm of needle length protrudes from the distal end wall of the collar.

11. The syringe according to claim 4 , wherein each of the plurality of slots is substantially perpendicular to an axis of the syringe.

12. The syringe according to claim 1 , wherein
the hub includes an axially extending channel;
the retaining feature includes a tab; and
the axially extending channel engages the retaining feature of the collar to allow axial movement.

13. The syringe according to claim 12 , wherein the axially extending channel is substantially parallel to an axis of the syringe.

14. The syringe according to claim 12 , wherein the collar travels axially without rotating when the tab on the collar is engaged to the axially extending channel on the hub.

15. The syringe according to claim 1 , further comprising a visual indicator to indicate a locked after-use position.

16. The syringe according to claim 1 , further comprising an internally facing flange or detent on the collar that engages the hub to provide a locking action to prevent proximal or rotational movement of the collar after use.

Assignees

• Becton Dickinson Co

Inventors

• Limaye Amit
• Srinivasan Sudarsan
• Andreoni Todd
• Rosen Edward J
• Gold Howard

Classifications

• A61M5/46 Primary

  having means for controlling depth of insertion · CPC title

• A61M2205/58

  Means for facilitating use, e.g. by people with impaired vision · CPC title