Patent ID: 7743452
Filing Date: 2010-06-29
Classification: A46B

Abstract:
1. A pneumatically adjustable toothbrush apparatus comprising: an elongated handle having a first end and a second end; a neck affixed to the second end of the handle; a head affixed to the neck; a pneumatic chamber within the handle, the neck, and the head; an adjustment knob rotatably affixed to the first end of the handle; a shaft affixed to an interior of the adjustment knob, the shaft sealably fitted within the chamber of the handle; a female thread within the shaft; a master piston slideably fitted within the chamber, the master piston incapable of rotation; a threaded piston rod connecting the master piston to the shaft; a plurality of pneumatic cylinders within the head, each cylinder in communication with the chamber; a slave piston within each cylinder; a plurality of bristle bases, each bristle base having a first end and a second end, each first end affixed to one slave piston; a bristle bundle affixed to each bristle base second end; a passage in each cylinder, one bristle base slideably and sealably disposed within each passage.