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:
Jan. 12, 1982
Filed:
May. 09, 1980
Applicant:
Inventor:
Frederic Lissau, Chicago, IL (US);
Assignee:
Sloan Valve Company, Franklin Park, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E03D / ;
U.S. Cl.
CPC ...
4304 ; 4305 ; 4623 ; 4DIG / ;
Abstract
An automatic flushing system having an electrically-operated flush valve, a sensor for determining the presence of a person and a control circuit responsive to the sensor for initiating the operation of the flush valve. The sensor emits pulses from within a defined viewing area. A lens system is arranged to collect reflected light only from the defined viewing area. Light reflected from walls, tile or other shiny surfaces does not activate the control circuit. The sensor is mounted below and behind the flush valve actuating means so as to be partially hidden from view and thus discourage tampering with the sensor.