Patent ID: 8387628

Claim:
A toothbrush assembly comprising: a toothbrush comprising: a handle for holding the toothbrush and having a compartment to receive a toothpaste cartridge; a head having bristles to brush teeth; a door covering an opening of the compartment, wherein the door in an open position receives the toothpaste cartridge into the compartment, and the door in a closed position secures the toothpaste cartridge received in the compartment; a conduit running from the compartment to the head, the conduit to facilitate delivery of the toothpaste from the toothpaste cartridge in the compartment to the head and the bristles; and the toothpaste cartridge to be installed in the compartment to dispense toothpaste, the toothpaste cartridge comprising: a housing having a cavity to store toothpaste; a piston having threads and disposed at least partially inside the housing; a paste plate coupled to the piston via the threads; a knob coupled to the piston to turn the piston to move the paste plate along the piston toward the head of the toothbrush to dispense the toothpaste from the cavity to through the conduit into the bristles of the toothbrush, wherein the door has an aperture to receive the knob such that the knob extends to an exterior of the toothbrush for access of the knob to a user when the door is in the closed position; and an end plate having at least one hole to discharge the toothpaste from the cavity of the cartridge to the conduit of the toothbrush.