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:
Jul. 19, 2011
Filed:
Dec. 09, 2004
Ronald C. Lilley, Federal Way, WA (US);
Scott E. Hall, Issaquah, WA (US);
John W. Pace, Bothell, WA (US);
William E. Bryant, North Bend, WA (US);
Joseph W. Grez, North Bend, WA (US);
Ronald C. Lilley, Federal Way, WA (US);
Scott E. Hall, Issaquah, WA (US);
John W. Pace, Bothell, WA (US);
William E. Bryant, North Bend, WA (US);
Joseph W. Grez, North Bend, WA (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The drive system drives a brushhead at a driving frequency. The drive system includes a frequency modulation system which changes. the driving frequency about a center frequency in such a manner, with selected frequency deviation and modulation frequency, which interacts with the resonance of the brushhead to produce a change of amplitude in the movement of the brushhead within a range of 5-30%.