A toothbrush has a number of rotatable brush assemblies mechanically linked so as to move together with a handle. Each rotatable brush assembly includes a wheel, with radially projecting bristles, configured to rotate about an axis which is roughly parallel to a plane of contact with the teeth. The axis...http://www.google.ca/patents/US6477729?utm_source=gb-gplus-sharePatent US6477729 - Toothbrush with longitudinal to lateral motion conversion
