U.S. Floor Systems, Inc.

Robert C Williams

William R Kimball

Apparatus and method for cleaning surfaces such as carpet and the like by the application of liquid and the vacuum extraction of liquid from the surface to be cleaned wherein operation in a selected one of two modes is facilitated. One mode of cleaning involves spraying an application of liquid. The other mode of operation involves sheeted application of liquid and subjects the liquid to ultrasonic vibration before extraction. Particular characteristics are described which enhance selectivity of cleaning in these two modes.

Cleaning apparatus and method

A liquid application and vacuum pick up cleaning apparatus wherein more thorough cleaning is facilitated by subjection of liquid on a surface being cleaned to agitation at ultrasonic frequencies for causing cavitation of the liquid.

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Smithfield, NC, United States of America

Robert C Williams