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:
Dec. 23, 2014
Filed:
Jul. 15, 2011
Tad Petrick, Evanston, IL (US);
Philip Sopicki, Glenview, IN (US);
John Poremba, Elmhurst, IL (US);
Brian Wixted, Crystal Lake, IL (US);
Jim Fisher, Waukegan, IL (US);
Harrison Yuan, Buffalo Grove, IL (US);
Mike Hansen, Village of Lakewood, IL (US);
Tad Petrick, Evanston, IL (US);
Philip Sopicki, Glenview, IN (US);
John Poremba, Elmhurst, IL (US);
Brian Wixted, Crystal Lake, IL (US);
Jim Fisher, Waukegan, IL (US);
Harrison Yuan, Buffalo Grove, IL (US);
Mike Hansen, Village of Lakewood, IL (US);
Bretford Manufacturing, Inc., Franklin Park, IL (US);
Abstract
An electrical system for a computer cart enables power to be diverted between electrical channels within the cart using an intelligent round robin charging scheme. All power may be diverted to individual channels one at a time for short charging intervals. When a selected primary channel does not require all available power within the cart, excess power is provided to a secondary channel. All three channels may likewise share power if excess is available. Relays are used to allow power to be controlled to the individual channels. Current sensors on each channel sense an amount of current used by the channel. The output of the current sensor is digitized and integrated to determine how much current is being used by the channel. The current is used by the control to detect uncharged laptops and to selectively divert power between channels to optimize use of power within the computer cart.