Medication Delivery Device
First Claim
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1. A medication delivery device comprising:
- a housing having a proximal and a distal end,a medication receptacle designed to be engaged with the housinga piston rod which is moveable in a distal direction for medication delivery anda drive device for rotating the piston rod in a first rotational direction and thereby moving the piston rod in the distal direction for medication delivery;
characterized in thatthe piston rod comprises two threaded sections, wherein a first threaded section is provided for threaded engagement with a reset element and a second threaded section is provided for threaded engagement with the drive device and wherein the threads in the first and second threaded sections are oppositely disposed, whereinin an operational state the reset element is prevented from rotation with respect to the housing, the piston rod thereby being prevented from moving in a proximal direction, andin a resetting state the reset element is allowed to rotate with respect to the housing, the medication delivery device being resettable by rotating the piston rod and the reset element in a second rotational direction and moving the piston rod in the proximal direction.
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Abstract
The present invention relates to a medication delivery device, to dosing mechanisms suitable for use in medication delivery devices, in particular in pen-type injectors, preferably having dose setting means and a drive device enabling the administration of a medicinal product from a single- or multi-dose medication cartridge, to a use of such device, and to a method of manufacturing or assembling such device.
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Citations
29 Claims
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1. A medication delivery device comprising:
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a housing having a proximal and a distal end, a medication receptacle designed to be engaged with the housing a piston rod which is moveable in a distal direction for medication delivery and a drive device for rotating the piston rod in a first rotational direction and thereby moving the piston rod in the distal direction for medication delivery; characterized in that the piston rod comprises two threaded sections, wherein a first threaded section is provided for threaded engagement with a reset element and a second threaded section is provided for threaded engagement with the drive device and wherein the threads in the first and second threaded sections are oppositely disposed, wherein in an operational state the reset element is prevented from rotation with respect to the housing, the piston rod thereby being prevented from moving in a proximal direction, and in a resetting state the reset element is allowed to rotate with respect to the housing, the medication delivery device being resettable by rotating the piston rod and the reset element in a second rotational direction and moving the piston rod in the proximal direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification