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US 11,598,399 B2Granted
Indexed drive system
AssigneeGlaxoSmithKline Consumer Healthcare (UK) IP Limited
InventorDavid Diamond
Life of this patent
Estimating the term…
Abstract
An indexed drive system (10) for mechanised tools, in particular an electric toothbrush, for selectively imparting various drive modes to a pair of concentrically-arranged drive shafts (12, 14) thereby imparting various brushing modes to the head (H) of the mechanised tool, in particular an electric toothbrush.
Claims13
A drive system for an electric toothbrush comprising concentric inner and outer rotatable shafts, the inner shaft extending beyond the outer shaft;
- an indexing assembly comprising a carriage located about the inner shaft and reciprocally displaceable longitudinally of the inner shaft;
- and a first coupling selectively operable to transmit drive from the inner shaft to the carriage, wherein the drive system further comprises a pair of converters for translating linear displacement of the carriage in one direction into a first limited angular displacement of the carriage and linear displacement of the carriage in a second direction opposite to a first direction into a limited second angular displacement of the carriage.
Dependencies are inferred from the claim text.