External backup power supply
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 23, 1999
Issued Date -
N/A
app pub date -
Apr 12, 1993
filing date -
Sep 7, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An external DC (direct current) power supply is provided for supplying backup DC power to a supported device having an AC input connector. The power supply includes an AC (alternating current) voltage source. A voltage rectifier is coupled to the AC voltage source for rectifying the AC voltage source. An energy storage device coupled in parallel to the voltage rectifier provides a predetermined DC voltage threshold level. A connector of the external DC power supply applies a power output of the parallel combination of the voltage rectifier and the energy storage device to the AC input connector of the supported device. The external DC power supply is capable of reliably, effectively and efficiently supplying backup power to the AC power input of a supported system without requiring any special wiring or modification of the supported system using only the AC input plug for connection to the supported system.
First Claim
Other Claims data not available
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 26 Citation Count
- H02J Class
- 76.32 % this patent is cited more than
- 26 Age