	US 12,138,136 B1
	Electrical toothbrush
Alireza Naeini, Richmond Hill (CA); Kourosh Ahmadnezhad, Karaj (IR); Mohammadbagher Ebrahimitirtash, Sari (IR); Azadeh Hosseini Farid, Tehran (IR); Mojtaba Geramiparsa, Richmond Hill (CA); Farzad Abedi Dorcheh, Isfahan (IR); and Nasser Ashgriz, Thornhill (CA)
Filed by Brushent Inc., Toronto (CA)
Filed on Feb. 29, 2024, as Appl. No. 18/591,097.
Int. Cl. A61C 17/34 (2006.01); A61C 17/22 (2006.01)

CPC A61C 17/3472 (2013.01) [A61C 17/221 (2013.01)]

15 Claims

1. An electric toothbrush, comprising:

a. a main shaft having an off position which defines an X axis;

b. a brush head connected to the main shaft having bristles wherein the bristles define a Y axis in the off position, wherein the Y axis is perpendicular to the X axis, the X and Y axes defining an X-Y plane, and a Z axis perpendicular to the X and Y axes, and wherein the X and Z axis defining an X-Z plane and the Z and Y axes defining a Z-Y plane;

c. a motor configured to produce a rotation;

d. a multi-directional movement mechanism connected to the brush head through the main shaft to provide a plurality of independent movements, comprising:

i) a gear system aligned in the Z-Y plane comprising a main gear that has one or more partial teeth sections on its outer or inner perimeter, and a first, a second, and a third gear positioned equally spaced from each other along the outer or inner perimeter of the main gear, respectively, wherein B the main gear transmits the rotation of the motor to each of the first, the second, and the third gear, selectively, upon engaging with each of them, respectively; wherein rotational axes of the first, second, and third gear are parallel,

ii) a first movement mechanism to transmit the rotation of the first gear to the main shaft to provide an oscillatory rotation of the brush head around the X axis;

iii) a second movement mechanism to transform the rotation of the second gear to the main shaft to provide an oscillatory side-to-side movement of the brush head aligned in the X-Z plane, and

iv) a third movement mechanism to transform the rotation of the third gear to the main shaft to provide an oscillatory back-and-forth movement of the brush head aligned in the X-Y plane;

e. a control system to turn on and off the electric toothbrush and to allow a user to select a movement from each of the plurality of the independent movements;

f. a power system to provide power to the electric toothbrush, and

g. an ergonomic waterproof shell to protect the electric toothbrush.