Patent ID: 8484788

Claim:
A brushhead for use in a power skin brush appliance which includes a drive system having a single drive member, comprising: a base assembly mountable to the drive system having a moving portion which in operation oscillates back and forth through a selected angle and with a selected frequency in response to the drive system; and at least first and second concentric annular oscillating filament tuft groups mounted on the moving portion of the base assembly, wherein the first and second oscillating filament tuft groups each comprise two adjacent rings of filament tufts, the filament tufts in the first and second oscillating filament tuft groups, respectively, being characterized by differential stiffness to produce an out-of-phase motion between the tips of the filaments in the first oscillating filament tuft group relative to the tips of the filaments in the second oscillating filament tuft group when the first and second filament tuft groups are wet.