Fountain toothbrush
AssigneeTrisa Burstenfabrik AG
InventorFranco Del Bon
Life of this patent
Estimating the term…
Abstract
A fountain toothbrush is described which comprises a bristle carrier, a set of bristles on the carrier near one end thereof, a rigid handle connected to the bristle carrier at an end of the latter remote from the bristles, and a reservoir for liquid or pasty dentifrice in the handle, wherein the bristle carrier has a duct therethrough leading from the bristle carrier to an outlet near or between the bristles; furthermore piston means mounted on the bristle carrier, and outlet means associated with the reservoir, the aforesaid piston being sealingly guided in the outlet means and adapted for displacement in the outlet means toward and away from the reservoir, whereby dentifrice is caused to flow from the reservoir through the duct towards the bristles by a short displacement of the piston in the outlet means toward the reservoir.
Claims9
A fountain toothbrush compsiring:
- a bristle carrier;
- a set of bristles on said carrier near one end thereof;
- a rigid handle connected to said bristle carrier at an end of the latter remote from said bristles, said handle being hollow and having an opening at the rear end thereof away from said bristle carrier;
- a rigid-walled reservoir for liquid or pasty dentifrice and being connected to said handle axially displaceable relative thereto, and protruding with its closed rigid rear end from said rear end opening when in rest position, said bristle carrier having a duct therethrough leading from the end of said bristle carrier joined to said handle to an outlet near or between said bristles;
- piston means rigidly mounted on said bristle carrier at the end thereof joined to said handle and having an axial bore therein being in free communication with said duct in said bristle carrier and opening out of the rear end of said piston means facing toward said reservoir;
- and
- said reservoir having a hollow interior and an outlet passage from said interior at the end thereof toward said bristle carrier, said piston means being sealingly inserted at rest and in actuated position in said outlet passage and adapted for a short displacement in said outlet toward and away from said reservoir, said outlet passage being in free communication with said duct at all times, whereby by a short displacement of said piston in said outlet passage toward said reservoir, dentifrice is caused to flow freely from said reservoir through said duct towards said bristles, said duct having in said bristle carrier, over at least a short length thereof, a diameter small enough to exert a capillary action on the dentifrice in said reservoir, thereby preventing dentifrice from leaking through said outlet passage into said duct, when said piston means are not displaced towards said reservoir;
- and
- spring means for returning said reservoir to its rest position relative to said piston after each short displacement of the former toward said bristle carrier.
Dependencies are inferred from the claim text.