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:
Mar. 18, 1997
Filed:
Nov. 01, 1995
Hironobu Kageyama, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A power supply apparatus with a back-up power unit includes: a plurality of AC-DC conversion units each connected in parallel to a commercial AC power source, and each converting an AC voltage of said power source to a high DC voltage; a plurality of DC-DC conversion units each connected to an output of each AC-DC conversion unit, each converting the high DC voltage to a low DC voltage to be supplied to a load, and each output thereof connected in parallel to said load; and a back-up power unit connected in parallel to the output of each AC-DC conversion unit through a first and second diodes in order to supply the high DC voltage to the DC-DC conversion unit when a failure occurs in the AC power source.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile