Patent ID: 7020925
Filing Date: 2006-04-04
Classification: A61C

Abstract:
1. A toothbrush distal end for attachment to a handle of a mechanical toothbrush including a driving means; the distal end comprising: a head; a neck having a proximal end and a distal end; a drive shaft having a driving bevelled gear fixed to distal end thereof; a brush consisting of a bristle array on a brush back plate, and a movement; the head being fixedly attached to the distal end of the neck; the neck being detachably couplable to the handle; the neck being hollow and serving as a sleeve for the drive shaft; the drive shaft being rotatingly drivable about its axis within the neck, by the driving means; wherein the movement is situated within a cavity in the head and is connected to the brush back plate, for moving the brush back plate along an elliptical orbital path with respect to the head when driven by the driving means via the rotating drive shaft; the movement comprising: a driven bevelled gear; a master gear; a transmission system; a slave gear; a first eccentric pin being eccentrically attachable to the master gear; a second eccentric pin being eccentrically attachable to the slave gear; the first and second eccentric pins for attachment of the brush back plate to the movement; the driven bevelled gear being drivenly coupled to the driving bevelled gear of the drive shaft, the driven bevelled gear being coupled to the master gear, such that the driven bevelled gear drives the master gear and the master gear drives the slave gear via the transmission, for rotating the master gear and the slave gear together in the same direction; the eccentric pins driving the brush in the elliptical orbital path.