Drive mechanism for a drug delivery device
First Claim
1. A drive mechanism of a drug delivery device for dispensing of a dose of a medicament, the drive mechanism comprising:
- an elongated housing extending in an axial direction;
a piston rod to operably engage with a piston of a cartridge to displace the piston in an axial distal direction;
a drive sleeve extending in the axial direction and being rotatably supported in the elongated housing; and
a dose setting member rotatably supported on a side wall portion of the elongated housing and being rotatable with respect to an axis extending in a radial direction relative to the axial direction, the dose setting member comprising a radially inwardly extending shaft relative to the elongated housing,wherein the drive sleeve is operably releasable from the piston rod and rotatably engageable with the dose setting member via the radially inwardly extending shaft for setting of the dose, andwherein the drive sleeve is displaceable in the axial direction between a proximal dose setting position and a distal dose injecting position for selectively and alternately engaging and disengaging with the piston rod and with the dose setting member.
1 Assignment
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Accused Products
Abstract
The present invention relates to a drive mechanism for a drug delivery device for dispensing of a dose of a medicament, and to a respective drug delivery device, wherein the drive mechanism comprises: —an elongated housing (30) extending in an axial direction (1, 2), —a piston rod (80) to operably engage with a piston (16) of a cartridge (14) to displace the piston (16) in axial distal direction (1), —a drive sleeve (60) extending in axial direction (1, 2) and being rotatably supported in the housing (30), —a dose setting member (40) rotatably supported on a side wall portion (31) of the housing (30) and being rotatable with respect to an axis (41) extending in radial direction (r), —wherein the drive sleeve (60) is operably releasable from the piston rod (80) and rotatably engageable with the dose setting member (40) for setting of the dose.
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Citations
19 Claims
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1. A drive mechanism of a drug delivery device for dispensing of a dose of a medicament, the drive mechanism comprising:
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an elongated housing extending in an axial direction; a piston rod to operably engage with a piston of a cartridge to displace the piston in an axial distal direction; a drive sleeve extending in the axial direction and being rotatably supported in the elongated housing; and a dose setting member rotatably supported on a side wall portion of the elongated housing and being rotatable with respect to an axis extending in a radial direction relative to the axial direction, the dose setting member comprising a radially inwardly extending shaft relative to the elongated housing, wherein the drive sleeve is operably releasable from the piston rod and rotatably engageable with the dose setting member via the radially inwardly extending shaft for setting of the dose, and wherein the drive sleeve is displaceable in the axial direction between a proximal dose setting position and a distal dose injecting position for selectively and alternately engaging and disengaging with the piston rod and with the dose setting member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 17, 18, 19)
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14. A drug delivery device for dispensing of a dose of a medicament, the drug delivery device comprising:
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a drive mechanism comprising; an elongated housing extending in an axial direction; a piston rod to operably engage with a piston of a cartridge to displace the piston in an axial distal direction; a drive sleeve extending in the axial direction and being rotatably supported in the elongated housing; and a dose setting member rotatably supported on a side wall portion of the elongated housing and being rotatable with respect to an axis extending in a radial direction relative to the axial direction, the dose setting member comprising a radially inwardly extending shaft relative to the elongated housing, wherein the drive sleeve is operably releasable from the piston rod and rotatably engageable with the dose setting member via the radially inwardly extending shaft for setting of the dose, and wherein the drive sleeve is displaceable in the axial direction between a proximal dose setting position and a distal dose injecting position for selectively and alternately engaging and disengaging with the piston rod and with the dose setting member; and the cartridge at least partially filled with the medicament and being arranged in the elongated housing of the drive mechanism or in a cartridge holder fixed to the elongated housing. - View Dependent Claims (15)
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Specification