Dose setting mechanism and method of setting a dose
AssigneeSanofi-Aventis Deutschland GmbH
InventorsSimon Lewis Bilton, David Martin Leak
Life of this patent
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Abstract
A dose setting mechanism for a drug delivery device. The mechanism may comprise a drug delivery device housing. A dose dial component is positioned in the housing and rotatable during dose setting and dose delivery. A split threaded insert is in threaded engagement with the dose dial component. The insert can transform from a first configuration to a second configuration when the dose dial component is rotated. In one dose setting mechanism arrangement, the first configuration may comprise a first open configuration and the second configuration may comprise a second closed configuration.
Claims16
Dose setting mechanism for a drug delivery device, the mechanism comprising:
- a drug delivery device housing;
- a dose dial component positioned at least partly in the housing and rotatable during dose setting and dose delivery;
- and
- a split threaded insert in threaded engagement with a helical groove of the dose dial component, wherein the split threaded insert comprises a thread, a first portion, and a second portion,
- wherein the split threaded insert is configured such that when the dose dial component is rotated, the first portion and the second portion move relative to each other such that the split threaded insert transforms from
- a first configuration in which the thread or parts of the thread are in an open state to
- a second configuration in which the thread or parts of the thread are in a closed state.
Dose setting mechanism for a drug delivery device, the mechanism comprising:
- a drug delivery device housing;
- a dose dial component positioned at least partly in the housing and rotatable during dose setting and dose delivery;
- and
- a split threaded insert in threaded engagement with a helical groove of the dose dial component, wherein the split threaded insert comprises a thread, a first portion, and a second portion,
- wherein the split threaded insert is configured such that when the dose dial component is rotated, the first portion and the second portion rotate relative to each other such that the split threaded insert transforms from
- a first configuration in which the thread or parts of the thread are in an open state to
- a second configuration in which the thread or parts of the thread are in a closed state.
Dose setting mechanism for a drug delivery device, the mechanism comprising:
- a drug delivery device housing;
- a dose dial component positioned at least partly in the housing and rotatable during dose setting and dose delivery;
- and
- a split threaded insert in threaded engagement with a helical groove of the dose dial component, wherein the split threaded insert comprises a thread,
- wherein the split threaded insert is configured such that when the dose dial component is rotated, the split threaded insert transforms from
- a first configuration in which the thread or parts of the thread are in an open state to
- a second configuration in which the thread or parts of the thread are in a closed state,
- wherein the split threaded insert comprises a proximal threaded portion and a distal threaded portion,
- wherein the proximal and distal threaded portions mate to form a thread, and
- wherein the thread is a male thread and wherein the male thread comprises an enlarged male thread when the dose dial component has been rotated to a set dose that is less than a predetermined minimum set dose and/or comprises a reduced male thread when the dose dial component has been rotated to set a dose equal to or greater than a predetermined minimum.
Dose setting mechanism for a drug delivery device, the mechanism comprising:
- a drug delivery device housing;
- a dose dial component positioned at least partly in the housing and rotatable during dose setting and dose delivery;
- and
- a split threaded insert in threaded engagement with a helical groove of the dose dial component, wherein the split threaded insert comprises a thread,
- wherein the split threaded insert is configured such that when the dose dial component is rotated, the split threaded insert transforms from
- a first configuration in which the thread or parts of the thread are in an open state to
- a second configuration in which the thread or parts of the thread are in a closed state, and
- wherein a male threaded portion of the split threaded insert is in threaded engagement with a groove provided on an outer surface of the dose dial component.
Dependencies are inferred from the claim text.