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:
Oct. 06, 2009
Filed:
May. 05, 2008
Akiji Yamaguchi, Osaka, JP;
Akiji Yamaguchi, Osaka, JP;
Keyence Corporation, Osaka, JP;
Abstract
A photoelectric sensor according to the present invention, performs a determination as to whether or not an object is present in a predetermined detection area and provides (1) a enable signal to enable operation related to a hazardous source and (2) a disable signal to disable the operation based on a result of the determination. The photoelectric sensor determines whether or not the object is present within the predetermined detection area and whether or not the object is present at a reference point which is a different location within a measurement area from the predetermined detection area, based on a position information; and provides the enable signal when the object is absent from the predetermined detection area but the object is present at the reference point, and provides the disable signal when the object is present within the predetermined detection area and the object is absent at the reference point.