Filling toothbrush

Details Filling toothbrush Filling toothbrush

1990-07-12

1992-02-11

Bratlie, Steven A.

Coating implements with material supply

Including means to apply material-moving force

In or at feeder

401141, 401171, 401176, 401177, 401270, A46B 1102

Patent

active

050871439

ABSTRACT:
A filling toothbrush having a hollow handle providing a supply space for toothpaste. A toothpaste dischage aperture is provided on the outer end of the handle beneath the bristles. A conduit inside the handle connects the aperture to the supply space at the inner end of the handle where a pump forces toothpaste through the conduit. The supply space has a cross-section increasing toward the pump in two stages provided by a first cylinder and a second cylinder within the handle. A piston within said first cylinder moves downwardly to push toothpaste toward the pump at the inner end of the handle. The second cylinder has a piston in the form of a ring having a width sufficient to span the difference in diameters of the first and second cylinders. An inwardly projecting flange on the ring piston is engaged by the first piston as it moves toward the pump and the two pistons then move in unison to expel toothpaste from the second cylinder.

REFERENCES:
patent: 4692047 (1987-09-01), Endo
patent: 4733983 (1988-03-01), Hertrampf

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