US 2014/0180244 A1Published application

Locking assembly for preventing dispensing of dose from medication dispensing device

AssigneeEli Lilly and Company

InventorJaime Ray Arnett

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Abstract

A locking assembly for a medication dispensing device including a housing, a drive member, a medication cartridge having a barrel holding medication between a movable plunger and a septum, and a dose delivery mechanism for controlling the advancement of the drive member. The locking assembly, in one form, includes a lock member, biased to move from a first position to a second position, with a first actuating element. The locking assembly also includes a second actuating element disposed on the drive member and cooperatively configured with the first actuating element. If the drive member of the device moves rearward from the shipped position due to a freezing of the medication, the second actuating element engages the first actuating element such that the lock member moves from the first position to the second position to lock the medication dispensing device from further dose dispensing.

Claims11

Dependent claims

A locking assembly for a medication dispensing device including a housing, a drive member extending in an axial direction within the housing, a medication cartridge having a barrel holding medication between a movable plunger and a septum, the plunger engageable by the drive member within the barrel, and a dose delivery mechanism for controlling the advancement of the drive member forward in the axial direction to advance the plunger forward in the axial direction toward the septum for dispensing a medication dose when the septum is pierced by a needle, the locking assembly comprising:

a lock member within said housing, said lock member including a first actuating element, said lock member biased to move from a first position to a second position, said lock member, when in said second position, engaging one of the drive member and the dose delivery mechanism to lock the medication dispensing device from further dose dispensing, said lock member, when in said first position, allowing dose dispensing;
a second actuating element disposed on the drive member and cooperatively configured with said first actuating element, said second actuating element having a rearward end, in the axial direction, disposed between a rearward end of said first actuating element and the plunger, said second actuating element rearward end, when the device is initially shipped for patient use after manufacture, being in an axially spaced relationship with said first actuating element rearward end that is no more than an axial distance the drive member will be forced rearward from a shipped position if the medication expands upon freezing to drive the plunger rearward;
whereby said second actuating element, if the drive member moves rearward from the shipped position due to a freezing of the medication, engages the first actuating element such that said lock member moves from said first position to said second position to lock the medication dispensing device.

a lock member within said housing, said lock member including a first portion and a second portion extending from said first portion away from the plunger, said second portion including a first locking element, said lock member axially movable within the housing from a first position to a second position;
a second locking element disposed on the dose delivery mechanism component and cooperatively configured with said first locking element;
said first locking element, when said lock member is disposed in said first position, being disengaged from said second locking element to allow rotation of the dose delivery mechanism component relative to the housing necessary for dose dispensing;
said first locking element, when said lock member is disposed in said second position, engaging said second locking element to prevent rotation of the dose delivery mechanism component relative to the housing to lock the medication dispensing device from further dose dispensing;
said lock member, when the device is initially shipped for patient use after manufacture, disposed within said housing in said first position;
said lock member first portion structured and arranged such that if the drive member moves rearward from the shipped position due to a freezing of the medication, said lock member first portion is contacted by the drive member to move said lock member from said first position to said second position to lock the medication dispensing device.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/108,424Filed 17 Dec 2013
Priority: 20 Dec 2012
Published: 26 Jun 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

A61M 5/31566
Administration mechanisms, i.e. constructional features, modes of administering a dose: means improving security or handling thereof
A61M 5/24
Syringes: ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or cartridges, e.g. automatic
A61M 5/31551
By rotational movement of dose setting member, e.g. during setting or filling of a syringe: including axial movement of dose setting member
A61M 5/3158
The piston rod being moved by the axial movement of a component directly in contact with it: the component being manually operated or triggered by…