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US 11,058,526 B2Granted
Handheld device drive system
AssigneeGlaxoSmithKline Consumer Healthcare (UK) IP Limited
InventorsDavid Diamond, Jean Diamond
Life of this patent
Estimating the term…
Abstract
This invention relates to a drive system which automatically disengages when a loading above a certain threshold limit is applied to the driven component, thus preventing damage to the drive system and foremost to the gearing between the drive system and the driven component when such a load is applied.
Claims14
A handheld device drive system comprising a rotatable head;
- a drive shaft;
- and a coupling operable to transmit drive from the drive shaft to the rotatable head, the coupling being adapted to automatically disengage the transmission of drive between the shaft and the rotatable head when a threshold torque on the rotatable head is exceeded,
- wherein the coupling comprises a gear set having at least one driving tooth in operative association with the drive shaft and cooperating driven teeth in operative association with the rotatable head, the at least one driving tooth being resiliently deformable in order to facilitate the disengagement of drive transmission,
- wherein the at least one driving tooth comprises at least one resiliently deformable finger, and
- wherein the at least one resiliently deformable finger comprises a metal wire.
2 more elements
Dependencies are inferred from the claim text.