Thomas M Hassell

US Patent:

62022415, Mar 20, 2001

Filed:

Sep 10, 1998

Appl. No.:

9/150877

Inventors:

Thomas Hassell - Kirkland WA
Stephen M. Meginness - Seattle WA
James C. McInnes - Seattle WA

Assignee:

Optiva Corporation - Snoqualmie WA

International Classification:

A46B 904
A61C 1722

US Classification:

15 221

Abstract:

A brushhead for an acoustic powered toothbrush having a particular bristle configuration which includes a plurality of bristle portions arranged in four columns and eight rows, wherein the distal end two adjacent rows and the proximal end two adjacent rows both have longer bristles than the remaining bristle portions except for an intermediate row of bristle portions which are slightly longer than the longer bristle portions. The distal, intermediate and proximal bristle portions all have pointed bristle portion tips.