Dose metering mechanism for an injection device
First Claim
Patent Images
1. A dose metering mechanism for setting a dose to be administered from an injection device, the dose metering mechanism comprising:
- a setting sleeve marked with different dose amounts in the circumferential direction, by which setting sleeve a dose can be set by rotation, anda rotating sleeve configured to be axially displaced by rotation, said axial displacement relative to the setting sleeve to prime a dispensing of the set dose by rotation, said rotating sleeve marked with different dose amounts in the circumferential direction that match the dose amounts marked on the setting sleeve, whereinsaid setting sleeve is coupled to the rotating sleeve so that each time the rotating sleeve is fully rotated out, the set dose amount of the setting sleeve is not offset from an associated matching set dose amount of the rotating sleeve in the circumferential direction.
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Abstract
A dose metering mechanism for setting a dose to be administered from an injection device, the mechanism including a setting sleeve marked with dose amounts by which a dose to be administered is set by rotation, and a rotating sleeve which can be rotated out of the dose metering mechanism to prime the dispensing of a dose and is marked with dose amounts, the setting sleeve coupled to the rotating sleeve whereby when the rotating sleeve is fully rotated out, the dose amount of the setting sleeve is not offset from an associated dose amount of the rotating sleeve.
32 Citations
16 Claims
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1. A dose metering mechanism for setting a dose to be administered from an injection device, the dose metering mechanism comprising:
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a setting sleeve marked with different dose amounts in the circumferential direction, by which setting sleeve a dose can be set by rotation, and a rotating sleeve configured to be axially displaced by rotation, said axial displacement relative to the setting sleeve to prime a dispensing of the set dose by rotation, said rotating sleeve marked with different dose amounts in the circumferential direction that match the dose amounts marked on the setting sleeve, wherein said setting sleeve is coupled to the rotating sleeve so that each time the rotating sleeve is fully rotated out, the set dose amount of the setting sleeve is not offset from an associated matching set dose amount of the rotating sleeve in the circumferential direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An injection device comprising a dose metering mechanism for setting a dose to be administered from the injection device, the dose metering mechanism comprising:
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a setting sleeve marked with different dose amounts in the circumferential direction, by which setting sleeve a dose can be set by rotation, a rotating sleeve configured to be axially displaced in a proximal direction relative to the setting sleeve to prime a dispensing of the set dose by rotation in a first direction and further configured to be axially displaced in a distal direction relative to the setting sleeve to administer the set dose by rotation in a second direction, said rotating sleeve marked with different dose amounts in the circumferential direction, and a locking element having an external thread which is engaged with an internal thread of the rotating sleeve, wherein the locking element rotates into the rotating sleeve when the rotating sleeve is rotated out of the dose metering mechanism such that the locking element moves distally relative to the rotating sleeve toward a front stop of the rotating sleeve, wherein said setting sleeve is coupled to the rotating sleeve so that each time the rotating sleeve is fully rotated out, the set dose amount of the setting sleeve is not offset from an associated matching set dose amount of the rotating sleeve in the circumferential direction. - View Dependent Claims (11, 12)
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- 13. A dose metering mechanism for setting a dose to be administered from an injection device, said dose metering mechanism comprising a setting sleeve incorporating at least one marking with different dose amounts in a circumferential direction by which a dose to be administered can be set by rotation, a rotating sleeve configured to be axially displaced in a proximal direction relative to the setting sleeve to prime the dispensing of a dose by rotation in a first direction and further configured to be axially displaced in a distal direction relative to the setting sleeve to administer the set dose by rotation in a second direction, which rotating sleeve has at least one marking with different dose amounts in a circumferential direction that matches the dose amounts marked on the setting sleeve, and a locking element having an external thread which is engaged with an internal thread of the rotating sleeve, wherein the locking element rotates into the rotating sleeve when the rotating sleeve is rotated out of the dose metering mechanism such that the locking element moves distally relative to the rotating sleeve toward a front stop of the rotating sleeve, wherein the setting sleeve is coupled to the rotating sleeve so that each time the rotating sleeve is in a fully rotated out state, the set dose amount of the setting sleeve is not offset from an associated matching set dose amount of the rotating sleeve in the circumferential direction and wherein the setting sleeve is freely rotatable relative to the injection device when the rotating sleeve is in a fully pushed-in state and is rotably fixed when the rotating sleeve is moved from the fully pushed-in state.
Specification