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. 29, 1981
Filed:
Sep. 28, 1979
Applicant:
Inventor:
Robert C Williams, Smithfield, NC (US);
Assignee:
U.S. Floor Systems, Inc., Raleigh, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47L / ;
U.S. Cl.
CPC ...
15321 ; 15322 ; 15353 ;
Abstract
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.