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. 16, 2012
Filed:
Apr. 29, 2009
Aric Pryor, Boonville, IN (US);
Mark Watson, Lexington, KY (US);
Mike E. Ciholas, Evansville, IN (US);
Justin E. Bennett, Evansville, IN (US);
Paul R. Blaylock, Evansville, IN (US);
Christopher J. Elpers, Evansville, IN (US);
Evan M. Buchanan, Evansville, IN (US);
Christopher Gander, Evansville, IN (US);
Timothy M. Debaillie, Evansville, IN (US);
Aric Pryor, Boonville, IN (US);
Mark Watson, Lexington, KY (US);
Mike E. Ciholas, Evansville, IN (US);
Justin E. Bennett, Evansville, IN (US);
Paul R. Blaylock, Evansville, IN (US);
Christopher J. Elpers, Evansville, IN (US);
Evan M. Buchanan, Evansville, IN (US);
Christopher Gander, Evansville, IN (US);
Timothy M. DeBaillie, Evansville, IN (US);
Alliance Coal, LLC, Lexington, KY (US);
Abstract
A system and method for detecting a proximity of a person to a machine includes a first transmitter unit carried by the person, a plurality of receiver units located on the machine at know locations, and a processing unit including data defining a first boundary around the machine. The first transmitter unit transmits a magnetic proximity signal having a predetermined signal strength and a predetermined signal frequency. Each of the plurality of receiver units is for determining a received signal strength of the received magnetic proximity signal. The processing unit: determines a location of the first transmitter unit relative to the machine based on the received signal strength of the magnetic proximity signal and the known location of the plurality of receiver units; and outputs a proximity warning signal if the location of the transmitter relative to the machine is within the first boundary around the machine.