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. 05, 1999
Filed:
Jan. 29, 1997
Applicant:
Inventors:
Koji Tsutsumi, Kobe, JP;
Ye Zengguang, Kobe, JP;
Assignee:
Nabco Limited, Kobe, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B / ; E05F / ;
U.S. Cl.
CPC ...
318480 ; 318450 ; 318460 ; 318467 ; 250221 ; 2502221 ; 49 25 ; 49 26 ;
Abstract
A object sensor system for a swing door includes swing-side and approach-side sensors. Each of the sensors includes light-emitters and light-receivers which are mounted on a swing door. The light-emitters emit light toward a floor, and the light-receivers receive the light as reflected from the floor. The light emitted and received provides an object sensing zone which has a rectangular shape on the floor having a width equal to or larger than the width of the door. The sensing zone includes a main sensing area closer to the door and an auxiliary sensing area extending along the main sensing area. The auxiliary sensing area is disabled when the door moves.