US 10,471,218 B2 · Drug delivery device

Abstract

The present disclosure is generally directed to a drug delivery device for selecting and dispensing a number of user variable doses of a medicament. The device comprises a housing (10), a dose selector (80) operable to set a dose by rotation relative to the housing (10), a number sleeve (60) arranged within the housing (10) such that at least a portion of the number sleeve (60) is visible through a first aperture (11b) in the housing (10), and a piston rod (30) coupled to the housing (10) and to a drive sleeve (40). Rotation of the drive sleeve (40) relative to the housing (10) causes the piston rod (30) to translate relative to the housing (10). The piston rod (30) is coupled to the housing (10) via a threaded interface (16, 31) with at least two different pitches.

Claims20

Dependent claims

A drug delivery device for selecting and dispensing a number of user variable doses of a medicament, the device comprising:

a housing having a threaded region;
a dose selector configured to set a dose by rotation relative to the housing;
a number sleeve arranged within the housing, wherein at least a portion of the number sleeve is visible through a first aperture in the housing;
a drive sleeve;
and
a piston rod coupled to the drive sleeve, the piston rod having a first threaded portion with a first pitch and a second threaded portion with a second pitch that is different than the first pitch, the first and second threaded portions being configured to engage the threaded region of the housing, wherein a rotation of the drive sleeve relative to the housing causes the piston rod to translate relative to the housing.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/321,879Filed 1 Jul 2015

Priority

EP 143060681 Jul 2014

Published

US 2017/0128673 A111 May 2017

Granted

12 Nov 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

A61M 5/31583
Constructional features; Drive mechanisms or modes for piston rods: the piston rod being moved by the rotational movement of a component directly…
A61M 5/20
Syringes: automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
A61M 5/3146
Details: priming, e.g. purging, reducing backlash or clearance
A61M 5/31511
Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing…:…

Drug delivery device

Life of this patent

Drug delivery device

Life of this patent

Abstract

Claims20