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:
May. 28, 2013
Filed:
Mar. 17, 2009
Applicants:
Shigeaki Sasaki, Kobe, JP;
Takashi Wada, Kobe, JP;
Kenji Nishigaki, Kobe, JP;
Inventors:
Assignee:
Nabtesco Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 40/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
An automatic door sensor includes light-emitters that cyclically emit and project light, and lenses that deflect emitted light in the direction perpendicular to a door opening. Light-receivers receive the projected light through segmented lenses. For each of the light-emitters, a setting unit sets therein whether each light-emitter should emit light. A control unit judges whether a human or an object is present in a surveillance area based on how the light-receivers receive light.