Electricity: battery or capacitor charging or discharging – Cell or battery charger structure – For handheld device
Reexamination Certificate
2005-03-04
2009-06-02
Ullah, Akm E (Department: 2838)
Electricity: battery or capacitor charging or discharging
Cell or battery charger structure
For handheld device
C320S112000
Reexamination Certificate
active
07541773
ABSTRACT:
In order to prevent a battery pack from being overly discharged during use in a power tool, a discharge voltage limit circuit is provided. The circuit disconnects the battery pack from the motor when the voltage of the battery pack falls below a predetermined level. However, the circuit is operable only when the main switch is OFF, that is, when no load is imposed on the motor.
REFERENCES:
patent: 2003/0096158 (2003-05-01), Takano et al.
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patent: 5-203684 (1993-08-01), None
patent: 11-198062 (1999-07-01), None
Funabashi Kazuhiko
Komuro Yoshihiro
Oomori Katsuhiro
Takano Nobuhiro
Yoshimizu Chikai
Antonelli, Terry Stout & Kraus, LLP.
Berhanu Samuel
Hitachi Koki Co,. Ltd.
Ullah Akm E
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