Patent ID: 9717859
Date: 2017-08-01
CPC Classifications: A61M

Claim:
1. A dosing apparatus that generates audible and tactile feedback in a medication delivery device, the dosing apparatus comprising: a housing comprising a distal portion and a proximal portion; a piston rod axially moveable in the housing; a rotatable drive sleeve configured to move the piston rod axially during dose dispensing; a dose dial sleeve threadedly engaged to the housing, the dose dial sleeve comprising a dose dial grip disposed about an outer surface of a proximal end of the dose dial sleeve; and a clutch plate coaxially arranged with the dose dial sleeve, the clutch plate comprising a plurality of clutch plate teeth provided on a first surface of the clutch plate; and a coil spring providing a bias to ensure that the plurality of clutch plate teeth maintains contact with a first plurality of teeth; wherein rotation of the dose dial sleeve causes a rotation of the first plurality of teeth to ride over the plurality of clutch plate teeth provided on the first surface of the clutch plate, so as to generate audible and tactile feedback when a dose of the medicament is being dialed by rotating the dose dial grip to increase a desired dosage.