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:
Aug. 31, 2010
Filed:
Sep. 12, 2003
Steven Carl Crusius, Buffalo Grove, IL (US);
James J. Fitzgibbon, Batavia, IL (US);
Robert Keller, Chicago, IL (US);
Matthew Stephen, Glen Ellen, IL (US);
Steven Carl Crusius, Buffalo Grove, IL (US);
James J. Fitzgibbon, Batavia, IL (US);
Robert Keller, Chicago, IL (US);
Matthew Stephen, Glen Ellen, IL (US);
The Chamberlain Group, Inc., Elmhurst, IL (US);
Abstract
A barrier movement operator with a backup source of DC power is disclosed. The power supply of the barrier movement operator sends current limited DC to the backup which uses the DC to charge a battery. The battery is in circuit at all times with the barrier movement operator power supply by means of a power diode and, when an AC mains power failure occurs, DC power is sent from the battery to power the barrier movement operator.