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:
Jul. 26, 2011
Filed:
Feb. 02, 2007
Yoshinari Kiyomasa, Kobe, JP;
Koji Kakuyama, Kobe, JP;
Shigeaki Sasaki, Kobe, JP;
Nabtesco Corporation, Tokyo, JP;
Abstract
Whether interruption is present in the connections of automatic door constituting units is detected. A plurality of automatic door constituting units (and) are interconnected in such a manner that they can communicate with each other via a bus (). The automatic door constituting units include a door controller () for controlling opening and closing of a door. The door controller () successively calls the other automatic door constituting units one by one via the bus (), and the other automatic door constituting units send a response to the calling via the bus (). The door controller () judges that the automatic door constituting unit the door controller () called is disconnected from the bus (), when said called automatic door constituting unit does not send a response within a predetermined time after the calling.