Coating implements with material supply – Including means to apply material-moving force – Piston-provided reservoir
Patent
1990-07-31
1991-11-05
DeMille, Danton D.
Coating implements with material supply
Including means to apply material-moving force
Piston-provided reservoir
401150, 401280, 401268, B43K 506, B43K 518, A46B 1100
Patent
active
050627287
ABSTRACT:
A dentifrice dispensing toothbrush is described which locks itself to prevent further pumping of dentifrice material when its replaceable supply cartridge is empty. The self locking mechanism eliminates the formation of voids in the material and consequent pump failure when the spent cartridge is replaced with a new one and material pumped therefrom. The toothbrush also includes a detachable brush head which is slidable to various positions to enhance cleaning after it is used. One embodiment of the invention includes a toothbrush having (1) a housing which has a body and a neck, (2) a reservoir situated within the housing body, (3) a removable cartridge positioned within the reservoir for storing dentifrice material, (4) a pumping means comprising a piston with an orifice for applying a pumping force to the dentifrice material to cause a controlled quantity of it to flow from the cartridge and through its orifice, (5) a detachable brush head having a platform with an opening therethrough and to which a series of bristles are attached, (6) a plunger for driving the piston which is slidably attached to the neck of the housing and to the brush head, (7) a hollow conduit within the plunger having one of its ends in communication with the piston orifice and having its remaining end in communication with the opening in the platform of the brush head so that dentifrice material is able to flow through the hollow conduit and through the opening in the platform to the brush head when a pumping force is applied and (8) locking means comprising a spacer disposed between the piston and the follower disc for preventing movement of the piston when a pumping force is applied and the follower disc is at its terminal position.
REFERENCES:
patent: 2294285 (1942-08-01), Chu
patent: 2987743 (1961-06-01), Capps
patent: 3816007 (1974-06-01), Fox
patent: 4685819 (1987-08-01), Endo
patent: 4787765 (1988-11-01), Kuo
DeMille Danton D.
Denson Fred L.
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