Young, Stuart Jay; Berger, Isaac;

Oscillating toothbrush

An oscillating toothbrush is disclosed in which an offset brushing head is integrally attached to a shank, the shank being housed with a two piece cylindrical handle. A pair of opposite pin surfaces cooperate with internally enclosed helical slots to provide an oscillating up down movement as the toothbrush moves across the surface of the teeth. The handle is provided with a rear stop surface cooperating with the end of the shank at which there is also located an apparatus of smaller diameter than the end of the shank in order to permit cleaning of the insides of the oscillating toothbrush.

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We claim:

1. An oscillating toothbrush comprising a brush head, a shank integrally connected to said brush head with said brush head being offset from said shank, a pair of oppositely projecting removable pin surfaces extending from said shank and adaptable to move in and out of cooperating helical slots, a cylindrical handle member substantially enclosing said shank, one end of said cylindrical handle terminating in a removable circular stop surface with an aperture formed at the center thereof, said circular stop preventing the pin surfaces from moving out of said slots, the end of said shank at said one end of said cylindrical handle forming a cooperating stop surface larger than said aperture and adapted to abut against said circular stop surface, whereby during assembly the shank may be inserted into the cylindrical handle member and the pair of pin surfaces inserted into the shank, the shank pins inserted into the helical slots and the removable stop surface secured to the cylindrical handle member to allow the pins to be moved only within the slots.

2. The invention of claim 1,

wherein said cylindrical handle is formed of two cylindrical members having mating surfaces, said slots being formed by helical depressions in opposite inside walls of one of said two cylindrical members, such that said helical slots are completely enclosed with said cylindrical handle.