Oral care implement

Patent metadata

Field	Value
Publication number	US-9565926-B2
Application number	US-201314348922-A
Country	US
Kind code	B2
Filing date	Mar 28, 2013
Priority date	Mar 28, 2013
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

An oral care implement with a gripping portion. The oral care implement is a toothbrush ( 100 ) including an elongated body ( 101 ) formed of a first material and a handle ( 104 ) including a proximal gripping portion ( 114 ) and a distal neck portion ( 115 ) supporting a head ( 102 ) containing a plurality of tooth cleaning elements ( 108 ). A longitudinally elongated through slot ( 130 ) is formed in the gripping portion ( 114 ) of the handle ( 104 ) which extends transversely between front and rear exposed surfaces ( 112 ) of the handle ( 104 ). A second material which is elastomeric is disposed in the slot ( 130 ). A longitudinally elongated depression ( 120 ) having a transversely concave profile is formed in the rear exposed surfaces ( 112 ) of the handle ( 104 ) which communicates with the slot ( 130 ). The second material extends at least partially in the depression ( 120 ).

First claim

What is clamed is:

1. A toothbrush comprising:
a head;
a handle having a front exposed surface and a rear exposed surface, the handle extending along a longitudinal axis;
a longitudinally elongated concave depression formed into the rear exposed surface of the handle;
the handle comprising a first component formed of a first material and a second component formed of a second material;
a through-slot formed in the first component that extends between a front surface of the first component and a rear surface of the first component; and
the second component extending through the through-slot so that a first surface of the second component forms a portion of the front exposed surface of the handle and a second surface of the second component forms a portion of the rear exposed surface of the handle, wherein the portion of the rear exposed surface of the handle that is formed by the second surface of the second component forms a floor of the longitudinally elongated concave depression.

2. The toothbrush according to claim 1 wherein the first component comprises the head.

3. The toothbrush according to claim 1 wherein the first material is a hard material and the second material is an elastomeric material.

4. The toothbrush according to claim 1 wherein the through-slot is elongated so as to have a length measured in a direction of the longitudinal axis that is greater than a width measured in a direction transverse to the longitudinal axis.

5. The toothbrush according to claim 1 wherein the first component comprises a rear exposed surface that forms portions of the rear exposed surface of the handle that are sidewalls of the longitudinally elongated concave depression.

6. The toothbrush according to claim 1 wherein the second component is a monolithic unitary structure and first surface of the second component forms a front gripping surface of the handle.

7. The toothbrush according to claim 1 wherein the through-slot is a longitudinally elongated through-slot, the first component comprising a plurality of spaced-apart transverse struts that interrupt the longitudinally elongated through-slot.

8. The toothbrush according to claim 1 wherein the floor of the longitudinally elongated concave depression has an oblong configuration in rear plan view of the handle.

9. The toothbrush according to claim 1 wherein the handle comprises a first transverse cross-sectional area taken at an axial position, and wherein the elongated concave depression comprises a second traverse cross-sectional area taken at the axial position, the second traverse cross-sectional area bounded by a portion of the rear exposed surface that defines the elongated concave depression and a reference plane that intersects apexes of sidewalls of the elongated concave depression, and wherein the second transverse cross-sectional area is at least 15% of the first transverse cross-sectional area.

10. The toothbrush according to claim 1 wherein the second component comprises a pad portion forming the floor of the longitudinally elongated concave depression.

11. A toothbrush comprising:
an elongated body formed of a first material and extending along a longitudinal axis, the elongated body comprising a front surface and a rear surface;
a longitudinally elongated through slot formed in the elongated body, the slot extending transversely between the front and rear surfaces of the elongated body and axially along the longitudinal axis, wherein the slot has a greater length measured in a direction of the longitudinal axis than a width measured in a direction transverse to the longitudinal axis; and
a second material disposed in the slot, the second material comprising an exposed first portion that covers at least a portion of the front surface of the elongated body and an exposed second portion that is recessed relative to the rear surface of the elongated body, the second material being different than the first material in at least one characteristic.

12. The toothbrush according to claim 11 , wherein the elongated body and the second material collectively form a handle of the toothbrush, and further comprising a longitudinally elongated concave depression formed into the handle, the exposed second portion of the second material forming a floor of the longitudinally elongated concave depression.

13. The toothbrush according to claim 12 , wherein the first material forms opposing lateral sidewalls of the longitudinally elongated concave depression that extend from the exposed second portion of the second material to the rear surface of the elongated body, the opposing lateral sidewalls being exposed.

14. The toothbrush according to claim 11 wherein the at least one characteristic is Shore A hardness.

15. The toothbrush according to claim 11 wherein the at least one characteristic is color.

16. The toothbrush according to claim 11 , wherein the second material is continuous on the front surface of the elongated body and across the slot.

17. The toothbrush according to claim 11 wherein the slot includes a middle portion disposed between the front and rear surfaces of the elongated body that is narrower in longitudinal cross-section than an adjoining lower portion of the slot near the rear surface of the elongated body.

18. The toothbrush according to claim 11 wherein the slot at the front surface of the elongated body is interrupted by a plurality of spaced apart ornamental features formed of the first material, the second material being disposed between the ornamental features, the ornamental features having front surfaces that are exposed and rear surfaces that are covered by the second material.

19. The toothbrush according to claim 11 wherein the first material is polypropylene and the second material is a thermoplastic elastomer.

20. A toothbrush comprising:
an elongated body formed of a first material and extending along a longitudinal axis, the elongated body comprising a front surface and a rear surface;
a longitudinally elongated through slot formed in the elongated body, the slot extending transversely to the longitudinal axis and penetrating the front and rear surfaces of the elongated body, the slot further extending axially along the longitudinal axis;
a second material disposed in the slot, the elongated body and the second material collectively forming a handle of the toothbrush; and
a longitudinally elongated concave depression formed into the handle, an exposed portion of the second material forming a floor of the longitudinally elongated concave depression.

21. The toothbrush of claim 20 , wherein the exposed portion of the second material is recessed relative to the rear surface of the elongated body.

Assignees

• Colgate Palmolive Co

Inventors

• Xi Wenjin
• Yan Ting
• Ji Yanmei

Classifications

• B25G1/102

  the shape being specially adapted to facilitate handling or improve grip · CPC title

• A46B2200/1066

  Toothbrush for cleaning the teeth or dentures (A61C17/16 takes precedence; bristles arrangements for toothbrushes A46B9/04) · CPC title

• A46B5/026 Primary

  Grips or handles having a nonslip section · CPC title

• A46B15/0087

  Brushes with decoration on or in the handle · CPC title

• A46B5/021

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