Refill for electric toothbrush

US11399924B2 · kind B2 · utility

Assignee

• The Braun Corporation · DE

Inventors

• Thomas Fritsch · Eppstein, DE
• Irina Neusser · Kronberg, DE
• Joern Utsch · Eschborn, DE

Key dates

• Filing date: Oct 29, 2020
• Grant date: Aug 2, 2022
• Expiry date: Oct 29, 2040

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61C17/3436
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A refill for an electric toothbrush comprises a generally tubular structure formed by refill walls defining an interior space for accepting thereinto a coupling stem of a toothbrush handle. The refill includes a motion transmitter functionally connected to the brush head for driving it. The refill has a coupling device including a pair of mutually opposite and resiliently deformable cantilevered arms disposed in the interior space of the refill and adjacent to the refill walls and extending from respective roots in a circular or semi-circular manner around, and in a plane substantially perpendicular to, the refill's longitudinal axis. Each of the arms is resiliently deformable and terminates with a coupling surface for engaging a coupling pin extending from the handle's coupling stem for secure and disengageable connection therewith.