Fountain tooth-brush

Details Fountain tooth-brush Fountain tooth-brush

1975-12-01

1977-03-22

Charles, Lawrence

Coating implements with material supply

Including means to apply material-moving force

Piston-provided reservoir

222390, 185 37, 401287, A46B 1102

Patent

active

040133702

ABSTRACT:
A tooth-brush carries its own supply of tooth paste in a removable cartridge inserted into the tooth-brush handle. The tooth paste is discharged through a passage from the cartridge to a flexible nipple located between the tooth-brush bristles. A piston is located in the cartridge to push the tooth paste towards the bristles. The piston has a groove engaging a longitudinal rib of the cartridge to prevent rotation of the piston. A screw is threaded through the piston and has a head urged forwardly by a spring abutting against a cap rigid with the tooth-brush handle. Upon screwing of the screw by a knob at the end of the tooth-brush body, the screw is caused to move rearwardly to a limit position to thereby compress the spring. The cocked spring produces slow and uniform discharge of a measured amount of tooth paste over the bristles by moving the screw and, therefore, the piston forwardly. A unidirectional clutch separates the knob and the screw head to prevent unwanted retraction of the piston and to permit replacement of the cartridge.

REFERENCES:
patent: 1988557 (1935-01-01), Jecker
patent: 2041605 (1936-05-01), Heilweil
patent: 2420825 (1947-05-01), Hutton
patent: 2991915 (1961-07-01), Boehm

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