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:
Jan. 27, 2009
Filed:
Jul. 01, 2005
Glen Appleby, St-Lazare, CA;
Stephen W. Brown, Montreal, CA;
Kostas Papazoglou, Dollard-des-Ormeaux, CA;
Glen Appleby, St-Lazare, CA;
Stephen W. Brown, Montreal, CA;
Kostas Papazoglou, Dollard-des-Ormeaux, CA;
Portec, Rail Products Ltd., Lachine, Quebec, CA;
Abstract
A sensor for detecting the presence of wheels of a rail vehicle includes first and second Hall Effect devices, a magnet for supplying a magnetic field to the first and second Hall Effect devices, the first and second Hall Effect devices and the magnet being mounted adjacent to the rail, whereby a railway vehicle wheel changes the magnetic field in the Hall Effect devices to produce wheel indication signals, and a processing circuit for receiving the wheel indication signals from the first and second Hall Effect devices and for producing an output signal in response to the wheel indication signals. A method of detecting the presence of a wheel is also provided.