Drive mechanisms suitable for use in drug delivery devices
First Claim
1. A drive mechanism for use in a drug delivery device comprising:
- a housing having a helical thread;
a dose dial sleeve having a helical thread engaged with the helical thread of the housing;
a drive sleeve releasably connected to the dose dial sleeve;
and a clutch means located between the dose dial sleeve and the drive sleeve;
the clutch means configured such that, a) when the dose dial sleeve and the drive sleeve are coupled, both are allowed to rotate with respect to the housing; and
b) when the dose dial sleeve and the drive sleeve are de-coupled, rotation of the dose dial sleeve with respect to the housing is allowed, while rotation of the drive sleeve with respect to the housing is prevented, whereby axial movement of the drive sleeve is allowed so that a force is transferred in the longitudinal direction to a proximal end of the drug delivery device.
2 Assignments
0 Petitions
Accused Products
Abstract
A drive mechanism suitable for use in drug delivery devices is disclosed. The drive mechanism may be used with injector-type drug delivery devices, such as those permitting a user to set the delivery dose. The drive mechanism may include a housing, a dose dial sleeve, and a drive sleeve. A clutch is configured to permit rotation of the drive sleeve and the dose dial sleeve with respect to the housing when the dose dial sleeve and drive sleeve are coupled through the clutch. Conversely, when the dose dial sleeve and drive sleeve are in a de-coupled state, rotation of the dose dial sleeve with respect to the housing is permitted and rotation of the drive sleeve with respect to the housing is prevented. In the de-coupled state, axial movement of the drive sleeve transfers force in a longitudinal direction for actuation of a drug delivery device.
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Citations
23 Claims
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1. A drive mechanism for use in a drug delivery device comprising:
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a housing having a helical thread;
a dose dial sleeve having a helical thread engaged with the helical thread of the housing;
a drive sleeve releasably connected to the dose dial sleeve;
and a clutch means located between the dose dial sleeve and the drive sleeve;
the clutch means configured such that, a) when the dose dial sleeve and the drive sleeve are coupled, both are allowed to rotate with respect to the housing; and
b) when the dose dial sleeve and the drive sleeve are de-coupled, rotation of the dose dial sleeve with respect to the housing is allowed, while rotation of the drive sleeve with respect to the housing is prevented, whereby axial movement of the drive sleeve is allowed so that a force is transferred in the longitudinal direction to a proximal end of the drug delivery device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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11. (canceled)
Specification