Patent ID: 9332828
Filing Date: 2016-05-10
CPC Classification: A46B,A61C

Claim Text:
1. A brush head of a power-driven toothbrush comprising: a support structure; a plurality of bristle tufts attached to the support structure and extending upwardly therefrom, said plurality of bristle tufts including: a first series of bristle tufts forming an outer ring of bristle tufts having major and minor axes; a second series of bristle tufts forming an intermediate ring of bristle tufts; a third series of bristle tufts forming an inner ring of bristle tufts; wherein said first, second and third series of bristle tufts are located generally concentrically with respect to each other and about a center point of the support structure; wherein the second and third series of bristle tufts have equal numbers of bristle tufts with the second and third series of bristles tufts each including only six bristle tufts; wherein each of the bristle tufts of the third series is located between a pair of bristle tufts of the second series; and wherein two of the bristle tufts of the third series of bristle tufts lie on the major axis and none of the remaining four bristle tufts lie on the minor axis.