Patent ID: 7757326

Claim:
A toothbrush comprising: a handle; a neck connected to said handle; a head connected to said neck and having a rigid portion having a first surface and a second surface, and a movable portion having a first surface and a second surface, wherein said rigid portion is non-movable relative to said neck and wherein said movable portion is movable relative to said neck; a mechanical vibratory device which causes the head to vibrate; wherein said rigid portion comprises a plurality of first cleaning elements extending from said first surface of said rigid portion that are fixedly mounted to the rigid portion, said rigid portion being an upstanding wall that creates a peripheral frame having a central opening; wherein said movable portion comprises a plurality of second cleaning elements extending from said first surface of said movable portion that are fixedly mounted to said movable portion, said movable portion located within the central opening; an annular gap in the head positioned between said rigid portion and said movable portion; a resilient membrane for flexibly attaching said movable portion to said rigid portion, said membrane positioned in a part of said gap; and a plurality of third cleaning elements, each third cleaning element mounted on said resilient membrane and connected to both said rigid portion and said movable portion; wherein no portion of any of the third cleaning elements extends outwardly beyond the second surfaces of said movable and rigid portions under any condition.