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:
Nov. 13, 1979
Filed:
Jun. 30, 1978
Applicant:
Inventor:
Paul H Ku, Woodside, NY (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47L / ;
U.S. Cl.
CPC ...
15319 ; 15339 ; 15340 ;
Abstract
In a preferred embodiment, a battery embodying and driven vacuum cleaner having a battery-recharging unit, having a pivoted and pivotably-driven driven wheel indirectly driven by an electric motor powered by the battery, and having other free-wheeling support wheels supporting the vacuum cleaner structure, and a vacuum cleaner vacuum motor driven by the electric motor, and a timer unit for setting the time of beginning and ending period of vacuuming, adapted to move randomly across a carpet and to change direction of movement whenever an obstacle is encountered.