IP Library › Granted Patent US 12,491,055
Granted Patent B2
US 12,491,055 · App. 18/463,481 · Granted Dec 9, 2025

Interdental cleaning tool

Inventors: Tasuku Kikkawa (Osaka, JP); Koki Asayama (Osaka, JP)
Assignee: Kobayashi Pharmaceutical Co., Ltd.
A61C15/02
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Quick Facts
Patent No.
US 12,491,055
App. No.
18/463,481
Granted
Dec 9, 2025
Kind
B2
Abstract

An interdental cleaning tool that achieves both easy insertion between teeth and improved cleaning effect is provided. The interdental cleaning tool 1 includes a base material portion 10 including a base section 11 and a shaft section 12 extending from the base section 11 , and a soft portion 20 covering at least a part of the shaft section 12 . The at least the part of the shaft section 12 has a first outer dimension X 1 defined in a first direction D 1 and a second outer dimension X 2 , defined in a second direction D 3 perpendicular to the first direction D 1 and smaller than the first outer dimension X 1 , in a cross section of the shaft section 12 perpendicular to an axial direction of the shaft section 12.

Claims (11)

1 . An interdental cleaning tool comprising:

a base material portion including a base section and a shaft section extending from the base section, the shaft section including a transition section and a distal end section extending from the transition section, wherein the transition section is flat, wherein the distal end section includes a distal end region and a proximal end region, and wherein a cross-sectional of the distal end section gradually transitions from a circle at the distal end region to a rectangular shape at the proximal end region; and

a soft portion covering the distal end region and the proximal end region of the shaft section, and having projections in at least a part of the distal end region wherein,

the distal end section of the shaft section is configured with different cross-sectional shapes and cross-sections perpendicular to an axial direction of the shaft section,

the distal end region is configured with a true-circle cross-section perpendicular to an axial direction of the shaft section, and

at least a part of the proximal end region of the shaft section has a first outer cross-sectional dimension defined in a first direction and a second outer cross-sectional dimension defined in a second direction perpendicular to the first direction, where the second outer cross-sectional dimension is smaller than the first outer cross-sectional dimension with the first and second outer cross-sectional dimensions each being perpendicular to the axial direction of the shaft section.

2 . The interdental cleaning tool according to claim 1 , wherein the first outer cross-sectional dimension is defined in a direction parallel to a plane extending along the base section.

3 . The interdental cleaning tool according to claim 1 , wherein a ratio of the second outer cross-sectional dimension to the first outer cross-sectional dimension is 0.20 to 0.98.

4 . The interdental cleaning tool according to claim 1 , wherein the second outer cross-sectional dimension is 1.0 mm or more.

5 . The interdental cleaning tool according to claim 1 , wherein the soft portion has a length, which is defined in the axial direction of the shaft section, of 15 mm or more.

6 . The interdental cleaning tool according to claim 1 , wherein a ratio of the second outer cross-sectional dimension to the first outer cross-sectional dimension gradually decreases from the distal end region toward the proximal end region of the shaft section.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 28, 2023
From: KIKKAWA, TASUKA; ASAYAMA, KOKI
To: KOBAYASHI PHARMACEUTICAL CO., LTD.
Reel/Frame 065684/0278 →
Priority Claims (1)
JP 2018-248341 · Dec 28, 2018 · national
Continuity (2)
Continuation 17418373
Related Publication 20230414334A1 · Dec 28, 2023
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