Brushhead for electric skin brush appliance
US8484788B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2011 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Oct 15, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA46B2200/102
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The brushhead is used in a power skin brush appliance which includes a drive system having a single drive member. The brushhead includes a base assembly mountable to the drive system with an optional outer annular fixed portion and an inner portion which in operation oscillates back and forth at a selected sonic frequency through a selected angle in response to action of the drive system. Mounted on the outer portion is a first group of filament tufts. Mounted on the oscillating portion are three concentric groups of filament tufts. Each oscillating group of filament tufts includes two annular rings of filament tufts. The filament tufts in the oscillating filament tuft groups have a selected physical characteristic which in one embodiment is diameter, which differs between the respective oscillating filament tuft groups sufficiently to produce a differential stiffness between the filaments thereof to in turn produce an out of phase motion of the tips of the filaments between the three oscillating filament tuft groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.