US 10,500,345 B2 · Spring assisted drug delivery device

Abstract

A spring assisted drug delivery device is provided comprising a housing and a lead screw having a longitudinal axis, a distal end and a proximal end that is rotatably fixed during dose setting and dose delivery and axially movable in a distal direction relative to the housing. The device further comprises a drive nut threadedly engaged and screwable along the lead screw threaded shaft and a number sleeve threadedly engaged with the housing to be screwable relative to the housing. A dial link is connected with the drive nut and axially movable and rotatably fixed relative to the drive nut and an inner sleeve is threadedly engaged with the number sleeve, the inner sleeve being axially movable and rotatably fixed relative to the housing. A mid-body is axially fixed inside of the housing. A spring is provided that assists a user of the device during a dose administration step.

Claims15

Dependent claims

A spring assisted drug delivery device comprising:

a housing,
a lead screw that is rotatably fixed with respect to the housing during dose setting and during dose delivery and that is axially moveable in a delivery direction relative to the housing for dose delivery,
a drive mechanism adapted and arranged to drive the lead screw in the delivery direction for dose delivery, and
a spring, wherein the spring is arranged between two components of the drive mechanism which are moveable with respect to one another and wherein the spring is adapted and arranged to assist a user of the spring assisted drug delivery device while the user applies a force to drive the lead screw during a dose delivery operation such that the force the user must exert for performing the delivery operation is reduced.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

15/034,497Filed 17 Nov 2014 · us provisional application

Priority

EP 1416574824 Apr 2014

Published

US 2016/0279337 A129 Sep 2016

Granted

10 Dec 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

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 5/3146
Details: priming, e.g. purging, reducing backlash or clearance
A61M 5/3155
Mechanically operated dose setting member: by rotational movement of dose setting member, e.g. during setting or filling of a syringe
A61M 5/31566
Administration mechanisms, i.e. constructional features, modes of administering a dose: means improving security or handling thereof

Spring assisted drug delivery device

Life of this patent

Spring assisted drug delivery device

Life of this patent

Abstract

Claims15