US 10,821,237 B2Granted

Pen needle

AssigneeBecton, Dickinson and Company

InventorsAmit Limaye, Sudarsan Srinivasan, David Schiff, Todd Sack, Breanna Stachowski

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Abstract

A pen needle assembly (10) includes a pen needle (12) with a hub body (16) having a needle shield (28) that covers a needle (26) and can be retracted to expose the needle during injection and return to the extended position after use and locked in the extended position. A spring (56) is provided to rotate the needle shield after use to a locked position. A locking member (84) can be provided on the needle shield that cooperates with the hub body (16) to prevent rotation after use. An attachment mechanism (38) for the pen needle provides a sensory indication when a needle-bearing hub body (16) is seated on a pen and limits further rotation of the pen needle relative to the delivery device.

Claims30

Dependent claims

A pen needle, comprising

a hub body having a proximal end for attachment to a delivery device, a distal end, and an inner surface having an axially extending track, said track having a lateral section at a distal end of said track;
a needle coupled to said hub body and having a distal end extending from said distal end of said hub body;
and
a needle shield having a tab received in said track, said needle shield mounted in said hub body and slidable between a first extended position to cover said needle and a retracted position to expose said distal end of said needle, wherein said needle shield is rotatable in a first direction from a first angular position in which said needle shield slides in said hub body between said first extended position and said retracted position and a second angular position in which said needle shield slides to a second extended position, and rotates to a third angular position where said tab is received in said lateral section and said needle shield is locked in the second extended position;
and
a locking mechanism actuated by rotation of said needle shield from said second angular position to said third angular position to lock said needle shield in said third angular position, said locking mechanism including a flexible finger biased radially outward from the needle shield, said flexible finger having a first end coupled to said needle shield and a second end, said hub body having an inwardly extending rib oriented between said track and said lateral section, said flexible finger configured for sliding over said rib of said hub body by rotation of said needle shield to said third angular position, whereby said second end of said flexible finger slides over said rib and engages said rib to prevent rotation of said needle shield and tab in a second direction.

3 more elements

A pen needle, comprising

a hub body having a proximal end for attachment to a delivery device and a distal end with an axial face;
a needle coupled to said hub body and having a distal end extending from said distal end of said hub body;
and
a needle shield coupled to said hub body for sliding and rotating in said hub body, said needle shield having a radially extending tab that slides within a first track formed on an inner surface of said hub body for sliding said needle shield between a first extended position to cover said needle and a retracted position to expose said distal end of said needle, and sliding in a second track to a second extended position to cover the distal end of the needle, and wherein said needle shield and tab of said needle shield are rotatable from a first angular position in which said needle shield slides in said first track of said hub body from said first extended position to said retracted position and to a second angular position in which said needle shield slides in said second track to said second extended position where said needle shield is in a locked position in the second extended position, and where said tab is not visible when said tab is in said first track and is visible through said axial face of said hub body when in said second track and said needle shield is in said second extended position.

1 more element

A needle assembly, comprising

a hub body having a proximal end, a distal end, an inner surface having an axially extending track, and said track having an open area in a distal face of said hub body;
a needle coupled to said hub body and having a distal end extending from said distal end of said hub body;
and
a needle shield mounted in said hub body for sliding between a first extended position to cover said needle, a retracted position to expose said needle, and locked second extended position, said needle shield having a tab configured for sliding in said hub body, and where said tab is not visible when said shield is in said first extended position and is visible through said open area in said distal face of said hub body when said needle shield is in said second extended position.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 15/989,465Filed 25 May 2018 · us provisional application
Priority: 26 May 2017
Published: US 2018/0339115 A129 Nov 2018
Granted: 3 Nov 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

A61M 5/3234
Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston: fully automatic needle retraction, i.e. in which…
A61M 5/002
Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning…:…
A61M 5/3202
Needles; Details of needles pertaining to their connection with syringe or hub ; Accessories for bringing the needle into, or holding the needle…:…
A61M 5/3213
Means for protection against accidental injuries by used needles: caps placed axially onto the needle, e.g. equipped with finger protection guards