Dose dial and drive mechanisms suitable for use in drug delivery devices
First Claim
1. A dose dial and drive mechanism for use in a drug delivery device comprising:
- a housing having a first end closest to a dispensing end of the device and a second end opposite the first end;
a dose dial sleeve;
a piston rod;
a drive sleeve is threadedly connected to the said piston rod;
a reset sleeve, which is located between said drive sleeve and said housing; and
a dose display,characterized in thata) when said dose dial sleeve travels towards the second end of said housing the reset sleeve is carried with said dose dial sleeve towards the second end of said housing thereby resetting said dose display to a zero position; and
b) when said dose dial sleeve and/or the reset sleeve travels towards the first end of said housing, the said dose dial sleeve and/or reset sleeve engage(s) with said drive sleeve thus advancing both said drive sleeve and said piston rod towards the first end of said housing.
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Accused Products
Abstract
A dose dial and drive mechanism for use in a drug delivery device having a housing, a dose dial sleeve, a piston rod, a drive sleeve threadedly connected to the piston rod, a reset sleeve, which is located between the drive sleeve and the housing, and a dose display. When the dose dial sleeve travels towards the second end of the housing the reset sleeve is carried with the dose dial sleeve towards the second end of the housing resetting the dose display to a zero position and when the dose dial sleeve and/or the reset sleeve travels towards the first end of the housing, the dose dial sleeve and/or reset sleeve engage(s) with the drive sleeve thus advancing both the drive sleeve and the piston rod towards the first end of the housing.
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Citations
12 Claims
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1. A dose dial and drive mechanism for use in a drug delivery device comprising:
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a housing having a first end closest to a dispensing end of the device and a second end opposite the first end; a dose dial sleeve; a piston rod; a drive sleeve is threadedly connected to the said piston rod; a reset sleeve, which is located between said drive sleeve and said housing; and a dose display, characterized in that a) when said dose dial sleeve travels towards the second end of said housing the reset sleeve is carried with said dose dial sleeve towards the second end of said housing thereby resetting said dose display to a zero position; and b) when said dose dial sleeve and/or the reset sleeve travels towards the first end of said housing, the said dose dial sleeve and/or reset sleeve engage(s) with said drive sleeve thus advancing both said drive sleeve and said piston rod towards the first end of said housing. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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2. A method of assembling a drug delivery device comprising:
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providing a dose dial and drive mechanism including; a housing having a first end closest to a dispensing end of the device and a second end opposite the first end; a dose dial sleeve; a piston rod; a drive sleeve threadedly connected to the piston rod; a reset sleeve located between the drive sleeve and the housing; and a dose display; and arranging the dose dial and the drive mechanism such that; (a) when the dose dial sleeve travels towards the second end of the housing, the reset sleeve is carried with the dose dial sleeve towards the second end of the housing, thereby resetting the dose display to a zero position; and (b) when the dose dial sleeve and/or the reset sleeve travels towards the first end of the housing, the dose dial sleeve and/or the reset sleeve engages with the drive sleeve thus advancing both the drive sleeve and the piston rod towards the first end of the housing.
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3. A method of delivering a drug comprising:
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providing a dose dial and drive mechanism including a housing having a first end closest to a dispensing end of the device and a second end opposite the first end; a dose dial sleeve; a piston rod; a drive sleeve threadedly connected to the piston rod; a reset sleeve located between the drive sleeve and the housing; and a dose display; and wherein the dose dial and the drive mechanism are configured such that (a) when the dose dial sleeve travels towards the second end of the housing, the reset sleeve is carried with the dose dial sleeve towards the second end of the housing, thereby resetting the dose display to a zero position; and (b) when the dose dial sleeve and/or the reset sleeve travels towards the first end of the housing, the said dose dial sleeve and/or the reset sleeve engages with the drive sleeve thus advancing both the drive sleeve and the piston rod towards the first end of the housing; and dispensing a drug comprising an active compound selected from the group consisting of insulin, growth hormone, low molecular weight heparin, their analogues and their derivatives. - View Dependent Claims (11, 12)
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Specification