Patent ID: 8584292

Claim:
A dual rotating electric toothbrush comprising: a) a housing having a front end, side walls defining a width of the housing, and a chamber accommodating a power source and a motor; b) a head assembly coupled to the front end of the housing, the head assembly comprising: (1) first and second elongated mounting members pivotally coupled to each other such that they can pivot about an axis generally parallel to the length of the mounting members; (2) a pair of first and second spaced apart shafts extending outwardly from the front end of the housing and through one of the respective mounting members such that they extend beyond an end of the respective mounting member, each of the shafts being rotated by the motor in opposing directions; (3) a brush mounted on each of the respective portions of the first and second shafts that extend beyond the mounting members so as to be rotated thereby, each brush having radially outward extending bristles, wherein the other ends of which define a circumferential perimeter, the circumferential perimeter of the bristles of one brush being spaced apart from the circumferential perimeter of the bristles of the other brush by a predetermined distance, and both of the circumferential perimeters being inside the sidewalls defining the width of the housing; (4) a protective cover piece extending from the ends of the mounting members and substantially extending over each of the brushes, the cover piece comprised of two portions that are defined by extensions of the respective mounting members which portions of the cover piece are pivoted to each other about an axis generally aligned with the pivot axis of the mounting members, one of the portions of the cover piece including a guide stop located adjacent the pivot axis of the cover pieces which in use is positioned so as to track an upper surface of a tooth located between the brushes, wherein the pivoted mounting members and respective cover pieces constitute a means for automatically moving and adjusting the pressure applied to the pair of spaced apart brushes in response to the width of a particular interfacing tooth located between the brushes, and c) means for automatically moving and adjusting the pressure applied to the pair of spaced apart brushes in response to the width of a particular interfacing tooth located between the brushes.