Toothbrush with a device for the perfect orientation of the bristles with respect to the surface of the teeth

Claim 2

A toothbrush including apparatus for the perfect orientation of the bristles with respect to the surface of the teeth, comprising: an anatomical grip having, at one end, an axial hole with a first portion including a substantially cylindrical section and a second, right regular prism-shaped portion; and a rod-like stem having at one end a head of bristles, and a terminal portion of cylindrical section at the opposite end, the terminal portion being forcibly insertable into said cylindrical portion of the axial hole of the grip, said stem being provided with a prism-shaped portion cooperating with said prism-shaped portion of the hole of the grip.

Claim 3

The toothbrush according to claim 1, wherein said prism-shaped portions have hexagonal bases.

Claim 4

The toothbrush according to claim 1, wherein said stem has an annular goniometric scale, while said grip has a reference notch for reading the orientation of the head of bristles with respect to the grip.

Claim 5

The toothbrush according to claim 1, wherein said terminal portion of the stem has a longitudinal cut to allow slight elastic deformation thereof.

Claim 6

In a toothbrush having a bristle-bearing head portion including bristles having ends defining a surface for engaging teeth to be brushed, and a radially non-symmetrical, anatomically-shaped handle portion having a longitudinal extent, the head portion being securable at a securing end thereof to the front end of the handle portion in a first reference position, the improvement comprising: annular means, carried by said front end of said handle portion and said securing end of said head portion, for securely positioning and holding said teeth engaging surface in a selected one of several other discrete positions circumferentially displaced from said first reference position about said handle portion longtudinal extent; and means carried by each of said head portion and said handle portion, for indicating the circumferential displacement of said selected discrete position relative to said first reference position.

Claim 7

In a toothbrush having a bristle-bearing head portion including bristles having ends defining a surface for engaging teeth to be brushed, and a radially non-symmetrical, anatomically-shaped handle portion having a longitudinal extent, the head portion being securable at a securing end thereof to the front end of the handle portion in a first reference position, the improvement comprising: annular means, carried by said front end of said handle portion and said securing end of said head portion, for securely positioning and holding said teeth engaging surface in a selected one of several other discrete positions circumferentially displaced from said first reference position about said handle portion longtudinal extent; and means carried by each of said head portion and said handle portion, for indicating the circumferential displacement of said selected discrete position relative to said first reference position.

Claim 8

The improvement of claim 5, wherein said annular positioning and holding means of said handle portion and said head portion are configured to permit reorientation of said teeth engaging portion relative to said reference position in at least three positions circumferentially displaced from said reference position by multiples of approximately 30°.

Claim 9

The improvement of claim 6, wherein said annular positioning and holding means of said handle portion comprises a bore having a portion of hexagonal cross-section, and said annular positioning and holding means of said head portion comprises a rod having a portion of similar cross-section.