Refillable dentrifice dispensing toothbrush

Details Refillable dentrifice dispensing toothbrush Refillable dentrifice dispensing toothbrush

1998-03-17

1999-06-22

Fetsuga, Robert M.

Coating implements with material supply

Including means to apply material-moving force

Piston-provided reservoir

401171, 401172, 401176, 401182, B43K 506

Patent

active

059136324

ABSTRACT:
A toothbrush unit allows for storage of a dentifrice within a cavity defined within a toothbrush body. The stored dentifrice is dispensed onto the bristles of the toothbrush head by actuating a bushing drive unit that is also disposed within the body cavity. The bushing drive unit of the toothbrush allows for two-way movement of a compression piston axially along a threaded drivescrew. Upon movement of the piston toward the bristlehead of the toothbrush, in which a plurality of openings are provided, the dentifrice is forced through the cavity, through the bristlehead openings, and onto the bristles. As the supply of the dentifrice is depleted, or at any time refilling is necessary, the piston is moved toward the posterior end of the toothbrush to allow for injection of additional dentifrice into the body cavity. The dentifrice is injected from an ordinary tube of dentifrice and into the cavity through an opening in the posterior end of the toothbrush, the opening having internal threads which mate with the standard external threading on the front tip of the dentifrice tube. A pressure relief orifice is formed into the toothbrush body to fluidly communicate with the body cavity, thereby permitting the release of air pressure during the refilling process.

REFERENCES:
patent: 3995648 (1976-12-01), Kuryla
patent: 4421433 (1983-12-01), Villanueva

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