Needle protection assembly

Patent metadata

Field	Value
Publication number	US-11738156-B2
Application number	US-201916696078-A
Country	US
Kind code	B2
Filing date	Nov 26, 2019
Priority date	Apr 16, 2008
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

The application relates to a needle protection assembly (1) comprising: —a supporting element (18) and a needle shield (8), —one locking element (20) located within said needle protection assembly (1) and not accessible to the user, —urging means (24) for displacing said needle shield (8), —a peg (19) located on said supporting element (18) or on said needle shield (8), and a cam (9) located on said needle shield (8) or on said supporting element (18), and —said locking element (20) is not formed by said peg (19) and cam (9). The respective longitudinal axis of the needle shield (8) and of the locking element (20) are merged when said needle shield (8) is in its before use or in use positions, and they form an angle (a) when said needle shield (8) is in its after use position.

First claim

What is claimed is:

1. A needle protection assembly, comprising:
a support bearing a needle;
a needle shield moveable relative to the support from a first position to a second position, wherein the needle shield extends further from the support in the second position as compared to the first position;
an outer sleeve that receives the needle shield therein, so as to be positioned at least partially thereabout, with the needle shield axially movable with respect to the outer sleeve, and wherein the outer sleeve is fixed to the support;
an urging means for biasing the needle shield from the first position to the second position;
a locking element configured to limit movement of the needle shield from the second position to the first position, wherein the locking element is separate from the needle shield and the outer sleeve, and wherein the needle shield slides axially relative to the locking element, with the needle shield positioned at least partially about the locking element when in the first position and positioned distally beyond the locking element when in the second position;
a peg provided on one of the support and the needle shield; and
a cam provided on the other of the support and the needle shield, the peg being moveable within the cam during transition from the first position to the second position, the cam comprising first and second tracks joining at an intersection via their ends,
wherein the peg is located at a first position in the first track when the needle shield is in the first position, and the peg is located at a second position in the second track when the needle shield is in the second position,
wherein the second position is axially spaced with respect to the first position,
wherein when the needle shield is in the first position, at least a portion of the needle is exposed, and wherein when the needle shield is in the second position, the needle shield covers the needle, and
wherein the cam further comprises an inclined surface at the intersection of the first and second tracks, the inclined surface being inclined from the first track towards the second track to urge the peg into the second track when the needle shield moves from the first position to the second position, and
wherein the second track defines a generally longitudinal profile, thereby allowing the urging means to allow the peg to advance in the second track, as the needle shield moves from the first position to the second position.

2. The needle protection assembly of claim 1 , wherein the first track defines a generally longitudinal profile.

3. The needle protection assembly of claim 1 , wherein the first position of the needle shield is an “in use” position, and in the “in use” position an “in use” portion of the needle is exposed, and the second position of the needle shield is an “after use” position and in the “after use” position, the needle shield covers the needle.

4. The needle protection assembly of claim 1 , wherein the needle shield is further moveable between a “before use” position and the “in use” position, wherein in the “before use” position a “before use” portion of the needle is exposed, the “in use” portion being greater than the “before use” portion.

5. The needle protection assembly of claim 4 , wherein the peg is located at the intersection when the needle shield is in the “in use position”.

6. The needle protection assembly of claim 3 , wherein the inclined surface advances the peg into the second track when the needle shield moves from the “in use” position to the “after use” position.

7. The needle protection assembly of claim 1 , wherein the urging means is a spring.

8. A needle protection assembly, comprising:
a support bearing a needle, the support comprising an inner core;
an outer sleeve fixed to the support and positioned about the support;
a needle shield received within the outer sleeve and that receives the inner core therein, the needle shield axially moveable relative to the outer sleeve from a first position to a second position, wherein the needle shield extends further from the outer sleeve in the second position as compared to the first position such that, when the needle shield is in the first position, at least a portion of the needle is exposed and, when the needle shield is in the second position, the needle shield covers the needle;
an urging means for biasing the needle shield from the first position to the second position;
a locking element configured to prevent movement of the needle shield from the second position back towards the first position;
a peg provided on one of the outer sleeve and the needle shield; and
a cam provided on the other of the outer sleeve and the needle shield, the peg being moveable within the cam during transition from the first position to the second position, the cam comprising first and second longitudinally oriented tracks joining at an intersection via their ends,
wherein the peg is located at a first position in the first track when the needle shield is in the first position, and the peg is located at a second position in the second track when the needle shield is in the second position; and
wherein the locking element is separate from the needle shield and the outer sleeve, and wherein the needle shield slides axially relative to the locking element, with the needle shield positioned at least partially about the locking element when in the first position and positioned distally beyond the locking element when in the second position.

9. The needle protection assembly of claim 8 , wherein the first position of the needle shield is an “in use” position and the second position of the needle shield is an “after use” position, with the peg located at the intersection with the needle shield at the “in use” position and the peg located in the second track with the needle shield at the “after use” position.

10. The needle protection assembly of claim 9 , wherein the needle shield is further moveable between a “before use” position and the “in use” position, with a longer portion of the needle exposed with the needle shield in the “in use” as compared to with the needle shield in the “before use” position.

11. The needle protection assembly of claim 10 , wherein the peg moves within the first track during transition from the “before use” position to the “in use” position.

Assignees

• Becton Dickinson France

Inventors

• Perot Frederic
• Barrelle Laurent
• Neale Kevin David
• Baney Bruno
• Holloway Paul

Classifications

• A61M5/326 Primary

  Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user · CPC title

• A61M5/3272

  having projections following labyrinth paths · CPC title

• A61M2005/3247

  Means to impede repositioning of protection sleeve from needle covering to needle uncovering position · CPC title

• A61M2005/3267

  Biased sleeves where the needle is uncovered by insertion of the needle into a patient's body · CPC title