US Patent 10918469 Toothbrush with fluid directing drive assembly

A toothbrush with fluid directing drive assembly is provided. The toothbrush may include a handle including an end surface, a brush shaft extending from the end surface of the handle, a drive assembly positioned within the handle and causing the brush shaft to oscillate upon actuation of a motor, a brush tip removably coupled to the brush shaft and positioned adjacent to the end surface of the handle, and a fluid passage defined within the drive assembly within the handle. The brush tip may include a fluid conduit therein. Oscillation of the brush shaft may cause the entire brush tip to oscillate correspondingly. Fluid may be transported through the drive assembly and to the fluid conduit of the brush tip by the fluid passage.