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. 29, 2014
Filed:
May. 13, 2009
Applicants:
James W. Citta, Lombard, IL (US);
Robert Urman, Schaumburg, IL (US);
Inventors:
James W. Citta, Lombard, IL (US);
Robert Urman, Schaumburg, IL (US);
Assignee:
Wabtec Holding Corp., Wilmerding, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08G 1/04 (2006.01); G01S 7/527 (2006.01); G01S 7/52 (2006.01); G01S 15/04 (2006.01); E05F 15/00 (2006.01);
U.S. Cl.
CPC ...
G01S 15/04 (2013.01); E05Y 2900/506 (2013.01); G01S 7/527 (2013.01); E05F 2015/0039 (2013.01); G01S 7/52006 (2013.01); E05Y 2900/51 (2013.01);
Abstract
A method and apparatus of recognizing the presence of a passenger in front of a door of a transit vehicle comprises directing an ultrasound transmitter/receiver at a volume of space adjacent the door, emitting an ultrasound pulse into the empty volume, recording and integrating intensity of the echoes and storing the integrated value as a standard value, repeatedly emitting an ultrasound pulse into the volume, and comparing the integrated values to the standard value.