Coating implements with material supply – Including means to apply material-moving force – Manually engageable resilient wall or wall portion
Patent
1974-09-16
1976-02-03
Charles, Lawrence
Coating implements with material supply
Including means to apply material-moving force
Manually engageable resilient wall or wall portion
401270, 401135, A46B 1104
Patent
active
039362000
ABSTRACT:
A toothbrush having a brushing unit and a dentifrice-containing cartridge unit. The cartridge unit is shaped to permit it to be comfortably held in the hand and has a squeezable wall for the purpose of expelling dentifrice from the dentifrice-containing chamber therein. A dentifrice passage extending from the dentifrice chamber to the brushing unit is normally closed by a valve which opens by the force of the dentifrice when the cartridge is squeezed. The cartridge has a check valve to allow air to replace used up dentifrice.
REFERENCES:
patent: 1676601 (1928-07-01), Cavanaugh
patent: 1859129 (1932-05-01), Costenbader
patent: 2807818 (1957-10-01), Taylor
patent: 3319837 (1967-05-01), Mueller
patent: 3738762 (1973-06-01), Moore et al.
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