Koninklijke Philips Corporation N.V.

William E Bryant

Joseph W Grez

Scott E Hall

Kevin Arnold Miller

Richard Taylor

Bruce E Taber

Piet C J Van Rens

Jerry Wood

Craig D Hanela

Jeffrey Raymond Gueble

Kurt Sadek

D I Stephan Leitner

Devin M Nelson

Bart Gottenbos

Jozef Johannes Maria Janssen

Martijn Jeroen Dekker

John W Pace

Ronald C Lilley

Andreas Loibnegger

Jon W Hayenga

Paul L W M Barten

Paulus L W M Barten

Paulus Corenlis Duineveld

Marinus Karel Johannes Jager

Adriaan Willem Cense

Andreas Lolbneggar

Marinus Karel Johannes De Jager

Paulus Cornelis Duineveld

The system includes a reservoir for fluid; a droplet generator for creating a stream of fluid droplets from the fluid wherein the velocity of the stream of droplets is within a range of 20 meters per second to 200 meters per second and the size of the droplets is within a range of 5 microns to 200 microns. A nozzle or nozzles direct the stream of droplets to safely clean a selected tooth or teeth surface area. The specific momentum of effective fluid droplets within the stream of fluid droplets is important in safe and effective cleaning.

Droplet jet system for cleansing

A method for tuning resonant spring assembly systems used in appliances such as power toothbrushes, particularly leaf spring systems, includes the step of measuring the frequency-dependent amplitude of the appliance workpiece, and then removing a portion of the spring member so as to decrease its spring rate sufficiently that the resonant frequency of the spring member closely approximates the drive frequency of the appliance.

Apparatus for converting side-to-side driving motion to rotational motion with a spring assembly and system for tuning the spring assembly

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%.

Changing amplitude of movement by changing the drive frequency of a toothbrush brushhead

The apparatus for converting side-to-side to rotational motion for a workpiece includes a spring assembly with a movable base mounting element which is driven in a slightly arcuate reciprocal side-to-side motion and a fixed mounting element spaced apart from the base element and mounted in the appliance so that it does not rotate or move in operation of the apparatus. A spring member, such as two planar leaf springs positioned at an angle to each other, is mounted between the movable base element and the fixed mounting element. A drive shaft member extends from the movable base element through the fixed mounting element and beyond. A workpiece such as a brushhead is mounted on the distal end of the drive shaft. The spring member is configured so that it is substantially less resistant to twisting action than bending action, such that the side-to-side motion of the base element results in rotation of the workpiece. A method for tuning resonant spring assembly systems used in appliances such as power toothbrushes, particularly leaf spring systems, includes the step of measuring the frequency-dependent amplitude of the appliance workpiece, and then removing a portion of the spring member so as to decrease its spring rate sufficiently that the resonant frequency of the spring member closely approximates the drive frequency of the appliance.

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North Bend, WA, United States of America

William E Bryant