RESETTABLE DRUG DELIVERY DEVICE
First Claim
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1. A resettable dosing mechanism, said dosing mechanism comprising:
- a dose button;
a dial grip operatively coupled to said dose button, said dial grip rotatable to set a dose;
a spindle for acting on a bung of a cartridge; and
a driver operatively coupled to said dose button and said spindle;
wherein during an injection of said dose, said dose button moves in an axial direction to cause said spindle to administer said dose, andwherein during resetting of said dose setting mechanism, said spindle is retracted back into said dose setting mechanism.
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Abstract
A resettable dosing mechanism comprises a dose button and a dial grip operatively coupled to the dose button. A spindle acts on a bung of a cartridge and a driver is operatively coupled between the dose button and the spindle. During an injection of the dose, the dose button moves in an axial direction to cause the spindle to administer the dose. During resetting of the dose setting mechanism, the spindle is retracted back into the dose setting mechanism.
52 Citations
20 Claims
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1. A resettable dosing mechanism, said dosing mechanism comprising:
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a dose button; a dial grip operatively coupled to said dose button, said dial grip rotatable to set a dose; a spindle for acting on a bung of a cartridge; and a driver operatively coupled to said dose button and said spindle; wherein during an injection of said dose, said dose button moves in an axial direction to cause said spindle to administer said dose, and wherein during resetting of said dose setting mechanism, said spindle is retracted back into said dose setting mechanism. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A resettable dose setting mechanism, said dose setting mechanism comprising:
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a inner housing having at least one helical groove; a dose dial sleeve rotationally engaged with said at least one helical groove of said inner housing; a driver provided within said inner housing; and a first clutch provided between said dial sleeve and said driver; a second clutch between said inner housing member and said driver wherein when a dose is set with said dose setting mechanism, said first clutch engages said dose dial sleeve and said driver to rotate together; wherein when the set dose is injected, said first clutch disengages said dose dial sleeve from said driver while said second clutch couples said driver to said inner housing, so that said dose dial sleeve rotates and said driver is prevented from rotating but moves axially against a spindle to expel said set dose; and wherein when resetting said dose setting mechanism, said first clutch decouples said driver from said dose dial sleeve and said second clutch decouples said driver from said inner housing, allowing said driver to be moved to a reset position. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A resettable drug delivery device, said device comprising:
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a cartridge holder comprising a releasable mechanical interlock; a resettable dose setting mechanism releasably coupled to said mechanical interlock, said dose setting mechanism comprising a dose button, a transfer sleeve operatively engaged with said dose button, and a rotatable dose setting sleeve surrounding said transfer sleeve, such that when said dose setting sleeve is rotated to reach a predetermined position, said dose setting sleeve releases said mechanical interlock and places said resettable dose setting mechanism in a reset condition. - View Dependent Claims (18, 19, 20)
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Specification