Patent ID: 7244073

Claim:
A toothbrush assembly comprising: a toothbrush head having a bristle end coupled to a shaft, the shaft having an encased channel extending from the bristle end to a threaded end; a toothpaste chamber having a brush end for receiving the threaded end of the toothbrush head and an open plunger end; and a removable plunger assembly coupled to the plunger end and having a plunger head extending into and sealing against an inside surface of the toothpaste chamber, the plunger head configured to impart both pressure and vacuum to a portion of the toothpaste chamber extending from the plunger head to the brush end, wherein only a surface of the plunger head is exposed to toothpaste in the toothpaste chamber as the plunger head rotates within the toothpaste chamber and moves laterally modifying a volume of the portion of the toothpaste chamber in response to rotating an exposed portion of the plunger assembly, and wherein the portion of the toothpaste chamber will fill by only coupling a toothpaste tube containing toothpaste to the brush end when the plunger head is moved a lateral distance towards the brush end reducing a volume of the portion of the toothpaste chamber and then moved laterally towards the plunger end expanding the volume of the portion of the toothpaste chamber to create a vacuum that extracts toothpaste from the toothpaste tube into the portion of the toothpaste chamber.