Safety device with collapsible housing and trigger activation

Patent metadata

Field	Value
Publication number	US-2023293824-A1
Application number	US-202318129128-A
Country	US
Kind code	A1
Filing date	Mar 31, 2023
Priority date	Dec 13, 2016
Publication date	Sep 21, 2023
Grant date	—

Abstract

Drug delivery safety devices having trigger activation systems activated by pressure against the skin of a patient and which automatically shield the needle after withdrawing the needle from the skin of the patient.

First claim

What is claimed is:

1 . A drug delivery safety device comprising:
a needle hub including a cannula having a distal tip; a trigger mechanism comprising a spring connecting the needle hub to a lock clip at a distal end of the needle cannula a flexible housing surrounding the needle cannula and connecting a Y-clip to the lock clip such that the distal tip of the cannula is exposed; a body configured to engage the hub, the body including an exterior wall, an inner cavity having a proximal end and a distal end, and a Y-clip disposed within the cavity, the Y-clip including first and second arms having angled surfaces, wherein the first and second arms are held open by engagement with first and second pockets at the distal end of the inner cavity and by distal force exerted by the spring; wherein a proximally-directed force applied to the lock clip compresses the spring and releases tension on the flexible housing, whereby the first and second arms of the Y-clip are released from the first and second pockets and the Y-clip moves proximally; and wherein a subsequent decrease in the proximal force applied to the lock clip decompresses the spring and moves the lock clip in a distal direction such that the lock clip covers the distal tip of the cannula.

2 . The drug delivery safety device of claim 1 , wherein the lock clip is housed in a cap which is attached to the flexible housing, the cap including an aperture to permit the cannula to pass therethrough.

3 . The drug delivery safety device of claim 2 , wherein the flexible housing is selected from the group consisting of a spring coil, a butterfly spring, a zig-zag coil, a rolled-sheet coil, a film tube, a filament, and telescoped sleeves.

4 . The drug delivery safety device of claim 2 , wherein the flexible housing is slack when the drug delivery safety device is in a pre-injection configuration.

5 . The drug delivery safety device of claim 1 , wherein the lock clip is a hook clip or a two-piece clip.

6 . The drug delivery safety device of claim 1 which is attached to a syringe via the needle hub.

7 . The drug delivery safety device of claim 1 , further comprising a removable anti-triggering cap which fits over the body and prevents triggering of the trigger mechanism, the cap comprising:
an outer wall which fits over the exterior wall of the body; and an interior wall which engages the first and second arms of the Y-clip when the cap is fitted over the exterior wall of the body, thereby preventing release of the first and second arms from the first and second pockets when proximal force is applied.

8 . The drug delivery safety device of claim 7 , further comprising a fill cap covering the exposed distal tip of the cannula.

Assignees

• Becton Dickinson Co

Inventors

• Browka Edward P
• Sanders Laurie
• Nichols Eli B
• Mcneill Philip C
• Henson Robert

Classifications

• A61M5/3273

  freely sliding on needle shaft without connection to syringe or needle · CPC title

• A61M5/3243

  being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel (devices for protecting guide needles in combination with catheters A61M25/0612) · CPC title

• A61M5/3232

  Semi-automatic needle retraction, i.e. in which triggering of the needle retraction requires a deliberate action by the user, e.g. manual release of spring-biased retraction means · CPC title

• A61M5/3221 Primary

  Constructional features thereof, e.g. to improve manipulation or functioning · CPC title

• A61M5/321

  Means for protection against accidental injuries by used needles · CPC title