The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 03, 2013
Filed:
Nov. 22, 2010
Pieter Johannes Bax, Drachten, NL;
Johannes Hotze Bernhard DE Vries, Haren, NL;
Pieter Johannes Bax, Drachten, NL;
Johannes Hotze Bernhard De Vries, Haren, NL;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
A power toothbrush includes a small electromagnetic actuator positioned within the brushhead for driving a brushhead assembly which includes a brushhead portion with bristles extending therefrom. The actuator includes a fixed lower element and a moveable upper element, with the lower and upper elements each having curved roller contacting portions at opposing ends thereof. Roller members are positioned between the roller contacting portions of the upper and lower members. At least one coil is mounted on the lower element, responsive to an alternating current energizing signal. Further, at least two permanent magnet assemblies are positioned on the upper element, having alternating polarity positions.