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. 17, 2012
Filed:
Jul. 16, 2008
Applicants:
Steven Mark Groff, Tucson, AZ (US);
Trung Le, Tucson, AZ (US);
Inventors:
Steven Mark Groff, Tucson, AZ (US);
Trung Le, Tucson, AZ (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J 1/10 (2006.01); H02J 3/38 (2006.01); H02J 7/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
A system for extending backup times using networks of direct current (DC) uninterruptible power supplies (UPS) is provided. A first DC UPS has a first input and a first output. A second DC UPS has a second input coupled to the first output of the first DC UPS, a second output coupled to at least one electrical load, and a third output coupled to the first input of the first DC UPS. Battery current from the first and second DC UPS is shared with the at least one electrical load in the event of a power loss.