Patent · US Active

Replacement head for electric toothbrush

US8336155B2 · kind B2 · utility

13Cited by

25References

20Claims

0Family size

Assignee

Ranir, LLC · US

Inventors

Scott P. Crossman · Rockford, US
Dai Xiaoguo · 马宅镇, CN

Key dates

Filing date	Mar 18, 2010
Grant date	Dec 25, 2012
Priority date	—
Expiry date	Jun 25, 2031

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61C17/222
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A replacement head for an electromagnetic toothbrush drive includes a mechanical linkage assembly for converting linear drive motion into rotational movement of the brush head. The mechanical linkage assembly includes a fixed shaft and a lever arm that extend between a movable bottom member and a fixed top member, and a link member rotatably connected to the top member and the brush head. The lever arm pivots about a fulcrum formed in the top member, and engages the link member. When the bottom member oscillates as a results of the actuation of the electromagnet in the drive unit, the lever arm pivots about the fulcrum and drives the link member to rotate in an arc shaped pattern. The rotation of the link member consequently rotates the brush head.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.