Filament for an oral care implement and oral care implement

US11284707B2 · kind B2 · utility

Assignee

• The Procter & Gamble Company · US

Inventors

• Erwin Mark · Eschborn, DE
• Jochen Kawerau · Kronberg, DE
• Jens Alinski · Kelkheim, DE
• Sven Alexander Franke · Darmstadt, DE
• Karen Lynn Claire-Zimmet · Hofheim, DE
• Uwe Jungnickel · Königstein, DE

Key dates

• Filing date: Oct 10, 2017
• Grant date: Mar 29, 2022
• Expiry date: Jun 29, 2038

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A46B2200/1066
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A filament for an oral care implement has a longitudinal axis and a substantially cross-shaped cross-sectional area extending in a plane substantially perpendicular to the longitudinal axis. The cross-shaped cross-sectional area has four projections and four channels. The projections and channels are arranged in an alternating manner. Each channel has a concave curvature formed by neighboring and converging projections. The concave curvature has a radius, and each projection is end-rounded thereby forming a curvature. The curvature has a diameter, and the ratio of the diameter of the curvature of the projection to the radius of the curvature of the channel is from about 0.2 to about 1.5.