Electricity: battery or capacitor charging or discharging – Battery or cell charging – With thermal condition detection
Reexamination Certificate
2004-10-22
2008-11-18
Ullah, Akm Enayet (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
With thermal condition detection
C320S141000, C320S150000, C320S153000, C363S016000, C323S247000, C323S255000, C323S259000, C323S266000, C323S273000, C323S274000, C323S275000
Reexamination Certificate
active
07453239
ABSTRACT:
A charging device that may perform charging with larger current is provided. The charging device comprises a switching element for increasing or decreasing charging power, a PWM controlling circuit for intermittently turning the switching element on or off, a current detecting circuit for detecting current flowing through the switching element, and a rectifying circuit for rectifying output voltage of the current detecting circuit in response to power supply voltage. The PWM controlling circuit has a limiter terminal for turning off the switching element when voltage equal to or above a determined value is input, and rectified voltage from the rectifying circuit is input to the limiter terminal. In this charging device, an amount of temperature increase of the switching element is suppressed so as to remain within a fixed range, and the charging power is not restricted unnecessarily.
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European Search Report, Issued Sep. 9, 2005.
European Search Report, Issued Apr. 27, 2005.
European Search Report, Issued Feb. 2, 2005.
English Translation of the Japanese Office Action for Application No. 2003-369597.
Communication pursuant to Article 96(2) EPC; Sep. 21, 2005.
Makita Corporation
Muralidar Richard V
Orrick Herrington & Sutcliffe LLP
Ullah Akm Enayet
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