Extractable dose setting knob
First Claim
1. An injection device for setting and dispensing a dose of a substance, the device comprising:
- a housing;
a guide sleeve arranged in the housing, the guide sleeve comprising one or more lugs;
a dispensing element which can be displaced relative to the housing by a user pulling the dispensing element out of the housing or the user pushing the dispensing element into the housing, the dispensing element comprising at least one catch orifice; and
a toothed rack arranged in the housing and guided by the guide sleeve, the toothed rack displaceable relative to the housing and the guide sleeve and comprising an end configured to engage with a stopper, a plurality of teeth disposed at a middle portion of the toothed rack and a locking element arranged at an end opposite the end configured to engage with the stopper, wherein the plurality of teeth are configured to engage with the one or more lugs to allow the toothed rack to move in a dispensing direction but not in a direction opposite the dispensing direction, and the locking element is configured to establish a coupling engagement with the at least one catch orifice before or during a substance dispensing operation and at least after the substance dispensing operation, and is further configured to remain substantially unengaged with the catch orifice until after a dose setting operation is complete;
whereby, due to an engagement between the at least one or more lugs and the teeth and the coupling engagement between the locking element and the catch orifice after the dispensing element has effected the substance dispensing operation once, the device can no longer be operated to dispense another dose.
3 Assignments
0 Petitions
Accused Products
Abstract
An injection device for dispensing a dose of a substance, the device including a housing, a dispensing element which can be displaced relative to the housing and a locking element which can be coupled with the dispensing element during or after a substance dispensing operation so that after the dispensing element has effected a dispensing operation once, it can no longer be operated to dispense another dose, and a method of locking an injection device after a substance has been dispensed once, whereby a dispensing element operated to dispense the substance is locked or blocked before, during or after dispensing a set dose so that no more substance can be dispensed.
34 Citations
20 Claims
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1. An injection device for setting and dispensing a dose of a substance, the device comprising:
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a housing; a guide sleeve arranged in the housing, the guide sleeve comprising one or more lugs; a dispensing element which can be displaced relative to the housing by a user pulling the dispensing element out of the housing or the user pushing the dispensing element into the housing, the dispensing element comprising at least one catch orifice; and a toothed rack arranged in the housing and guided by the guide sleeve, the toothed rack displaceable relative to the housing and the guide sleeve and comprising an end configured to engage with a stopper, a plurality of teeth disposed at a middle portion of the toothed rack and a locking element arranged at an end opposite the end configured to engage with the stopper, wherein the plurality of teeth are configured to engage with the one or more lugs to allow the toothed rack to move in a dispensing direction but not in a direction opposite the dispensing direction, and the locking element is configured to establish a coupling engagement with the at least one catch orifice before or during a substance dispensing operation and at least after the substance dispensing operation, and is further configured to remain substantially unengaged with the catch orifice until after a dose setting operation is complete; whereby, due to an engagement between the at least one or more lugs and the teeth and the coupling engagement between the locking element and the catch orifice after the dispensing element has effected the substance dispensing operation once, the device can no longer be operated to dispense another dose. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of locking an injection device for dispensing a dose of a substance after a dose has been dispensed, the method comprising:
providing an injection device comprising; a housing; a guide sleeve arranged in the housing, the guide sleeve comprising one or more lugs; a dispensing element which can be displaced relative to the housing by a user pulling the dispensing element out of the housing or the user pushing the dispensing element into the housing, the dispensing element comprising at least one catch orifice; and a toothed rack arranged in the housing and guided by the guide sleeve, which can be displaced relative to the housing and the guide sleeve, the toothed rack comprising an end configured to engage with a stopper, a plurality of teeth disposed at a middle portion of the toothed rack and a locking element arranged at an end opposite the end configured to engage with the stopper, wherein the plurality of teeth are configured to engage with the one or more lugs to allow the toothed rack to move in a dispensing direction but not in a direction opposite the dispensing direction, and the locking element is configured to form a coupling engagement with the catch orifice and to remain substantially unengaged with the catch orifice until after a dose setting operation is complete; and locking the dispensing element associated with the injection device before or during dispensing a dose and at least after dispensing the dose whereby, locking is established due to an engagement between the at least one lug and the teeth and the coupling engagement between the locking element and the catch orifice after a dose has been dispensed once, and the device can no longer be operated to dispense another dose. - View Dependent Claims (18)
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19. An injection device for dispensing a dose of a substance, the device comprising a housing, an ampoule holder displaceable relative to the housing, a dual chamber ampoule accommodated in the ampoule holder, a guide sleeve arranged in the housing, the guide sleeve comprising one or more lugs, a dispensing element displaceable relative to the housing to set a dose of substance to be administered and to effect a dispensing operation, the dispensing element comprising at least one catch orifice, and a toothed rack arranged in the housing and guided by the guide sleeve, which can be displaced relative to the housing and the guide sleeve, the toothed rack comprising an end configured to engage with a stopper, a plurality of teeth disposed at a middle portion of the toothed rack and a locking element arranged at an end opposite the end configured to engage with a stopper, the plurality of teeth configured to engage with the one or more lugs to allow the toothed rack to move in a dispensing direction but not in a direction opposite the dispensing direction, the locking element coupleable to the dispensing element before or during dispensing a dose and at least after the dose has been dispensed in a dispensing operation and configured to remain substantially unengaged with the at least one catch orifice until after a dose setting operation is complete, whereby, due to an engagement between the at least one lug and the teeth and the coupling engagement between the locking element and the catch orifice after the dispensing element has effected the dispensing operation once, the device can no longer be operated to dispense another dose, and wherein the injection device is configured such that a first substance and a second substance contained in the dual chamber ampoule are admixed as the ampoule holder is displaced relative to the housing.
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20. An injection device for dispensing a dose of a substance, the device comprising a housing, an ampoule holder displaceable relative to the housing, a guide sleeve arranged in the housing, the guide sleeve comprising one or more lugs, a dispensing element displaceable relative to the housing, the dispensing element comprising at least one catch orifice, and a toothed rack arranged in the housing and guided by the guide sleeve, which can be displaced relative to the housing and the guide sleeve, the toothed rack comprising an end configured to engage with a stopper, a plurality of teeth disposed at a middle portion of the toothed rack and a locking element arranged at an end opposite the end configured to engage with the stopper, the plurality of teeth configured to engage with the one or more lugs to allow the toothed rack to move in a dispensing direction but not in a direction opposite the dispensing direction, wherein the locking element can be coupled with the dispensing element before or during a substance dispensing operation and at least after the substance dispensing operation and is configured to remain substantially unengaged with the catch orifice until after a dose setting operation is complete, whereby, after the dispensing element has effected the dispensing operation once, the device can no longer be operated to dispense another dose, wherein in an initial state the dispensing element is positioned relative to the housing such that the dispensing element cannot be grasped by a user, and wherein the ampoule holder is coupled to the dispensing element such that as the ampoule holder is displaced relative to the housing the dispensing element is moved proximally from the initial position to a dose setting position.
Specification