Oral care implement

Patent metadata

Field	Value
Publication number	US-11399622-B2
Application number	US-201816225809-A
Country	US
Kind code	B2
Filing date	Dec 19, 2018
Priority date	Dec 20, 2017
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

An oral care implement has a front side and a back side opposite the front side and an overall length extension between mutually opposite proximal and distal ends. A head of the implement, disposed at the proximal end, has at least one cleaning element extending from the front side. A handle is at least partially made from a material having a density higher than that of the head's material. The handle's cross-sectional area, extending substantially perpendicular to the overall length extension, has a height extension between the front and back sides. The implement has a center of gravity situated below an axis of rotation when the oral care implement is placed with its back side on a surface. The center of gravity is closer to the back side than to the front side of the implement when measured along the height extension of the handle.

First claim

What is claimed is:

1. An oral care implement having a front side and a back side opposite to the front side, an overall length extension between a proximal end and a distal end, the distal end being opposite the proximal end, the oral care implement comprising a head at the proximal end and a handle, the head having at least one cleaning element extending from the front side, the handle being at least partially made from a material having a density being higher than the density of the material of the head,
the handle having a cross-sectional area extending substantially perpendicular to the overall length extension of the oral are implement, the cross-sectional area having a height extension extending between the front side and the back side,
the oral care implement having a center of gravity and an axis of rotation when the oral care implement is placed with the back side on a surface, wherein the center of gravity is below the axis of rotation and the center of gravity is closer to the back side than to the front side of the oral care implement when measured along the height extension of the handle, wherein the head comprises a non-magnetic and/or non-ferromagnetic material, and the handle comprises a magnetic and/or ferromagnetic material comprising from about 13 weight percent to about 30 weight percent of an amorphous thermoplastic resin; from about 3 weight percent to about 25 weight percent of aluminum oxide, boron nitride or aluminum silicate; and from about 45 weight percent to about 67 weight percent of iron oxide.

2. The oral care implement of claim 1 , wherein the center of gravity is located at a distance measured from the distal end, and the ratio of said distance to the overall length extension is from about 0.30 to about 0.45.

3. The oral care implement of claim 1 , wherein the overall length extension is from about 180 mm to about 220 mm.

4. The oral care implement of claim 1 , wherein the head is at least partially made from a material having a density from about 0.5 g/cm 3 to about 1.2 g/cm 3 , and the handle is at least partially made from a material having a density from about 2.1 g/cm 3 to about 3.1 g/cm 3 .

5. The oral care implement of claim 1 , wherein the amorphous thermoplastic resin is selected from the group consisting of: acrylonitrile butadiene styrene, polystyrene, styrene acrylonitrile, and any mixture thereof.

6. The oral care implement according to claim 1 , wherein the magnetic and/or ferromagnetic material comprises about 27.5 weight percent of an amorphous thermoplastic resin, about 17 weight percent of aluminum oxide, about 51 weight percent of iron oxide, and about 4.5% glass fiber.

7. The oral care implement of claim 1 , wherein the amorphous thermoplastic resin comprises about 17% weight percent styrene acrylonitrile, and 10.5 weight percent of a blend comprising polybutylene terephthalate and polyethylene terephthalate.

8. The oral care implement of claim 1 , wherein the material of the head comprises polypropylene.

9. A kit comprising the oral care implement of claim 1 and a magnetic holder for attaching and holding the oral care implement.

10. A method for manufacturing an oral care implement of claim 1 , the method comprising steps:
providing an amorphous thermoplastic resin;
providing aluminum oxide, boron nitride or aluminum silicate;
providing iron oxide;
mixing the amorphous thermoplastic resin, aluminum oxide, boron nitride or aluminum silicate and iron oxide into a magnetic and/or ferromagnetic molding material;
heating the molding material mixture into a flowable molding material;
molding the flowable molding mixture into a handle or part of a handle so that the handle comprises from about 13 weight percent to about 30 weight percent of an amorphous thermoplastic resin, from about 3 weight percent to about 25 weight percent of aluminum oxide, boron nitride, or aluminum silicate, and from about 45 weight percent to about 67 weight percent of iron oxide;
providing a non-magnetic and/or non-ferromagnetic material; and
molding the non-magnetic and/or non-ferromagnetic material into a head or part of a head.

11. The method of claim 10 , wherein the amorphous thermoplastic resin comprises styrene acrylonitrile, polybutylene terephthalate and/or polyethylene terephthalate.

12. The method of claim 10 , wherein at least a portion of the amorphous thermoplastic resin is blended with glass fiber.

13. The method of claim 10 , wherein the amorphous thermoplastic resin is provided in a range from about 13 weight percent to about 30 weight percent, the aluminum oxide, boron nitride or aluminum silicate is provided in a range from about 3 weight percent to about 25 weight percent, and the iron oxide is provided in a range from about 45 weight percent to about 67 weight percent.

14. The method of claims 10 , the method comprising a step of electroplating the handle with a thermoplastic elastomer or a polypropylene material.

Assignees

• Gillette Co Llc

Inventors

• Jungnickel Uwe

Classifications

• A46B15/0002

  Arrangements for enhancing monitoring or controlling the brushing process · CPC title

• A46B5/0095

  Removable or interchangeable brush heads · CPC title

• A46B15/0095 Primary

  Brushes with a feature for storage after use · CPC title

• A46B9/045

  specially adapted for cleaning a plurality of tooth surfaces simultaneously · CPC title

• A46B5/021

  Grips or handles specially adapted to conform to the hand · CPC title