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:
Jul. 29, 2008
Filed:
Sep. 29, 2004
Fumikazu Takahashi, Hitachi, JP;
Isao Nemoto, Legal Representative, Oyama, JP;
Akihiko Kanouda, Hitachinaka, JP;
Masahiro Hamaogi, Odawara, JP;
Yoshihide Takahashi, Odawara, JP;
Fumikazu Takahashi, Hitachi, JP;
Isao Nemoto, legal representative, Oyama, JP;
Akihiko Kanouda, Hitachinaka, JP;
Masahiro Hamaogi, Odawara, JP;
Yoshihide Takahashi, Odawara, JP;
Hitachi Computer Peripherals Co., Ltd., Kanagawa, JP;
Abstract
In the case where there coexist general loads requiring backup only for a short duration and a specific load requiring backup for a longer duration, uninterruptible power with higher reliability is supplied to the specific load with the adoption of a simple configuration. A DC backup power supply system comprises an AC/DC converter for normally supplying DC power to loads in while (the general loads and the specific load, included), and a control circuit for supplying DC output backing up the loads in whole for relatively short time only from a battery at the time of a power outage, while supplying DC output backing up the specific load, such as a cache memory and so forth, for relatively long time. Thus, it is possible to implement an uninterruptible power supply system small in size and low in cost, provided with a function for proper use depending on a prevailing situation.