Charging system including a charger and an electric power tool o

Details Charging system including a charger and an electric power tool o Charging system including a charger and an electric power tool o

1999-03-18

2000-05-23

Berhane, Adolf Deneke

Electricity: battery or capacitor charging or discharging

Cell or battery charger structure

For handheld device

320115, H02J 700

Patent

active

060669381

ABSTRACT:
A battery-charging system is provided that does not require removal of batteries from an impact screwdriver (1) for recharging. The battery-charging system includes the impact screwdriver and a charger (20). The impact screwdriver (1) has a nose (3a) to which a tool bit is attached. The impact screwdriver additionally includes a grip handle (4) containing a battery unit (5) whose terminals (10) for recharging are exposed in a surface of a protrusion (7) of the grip handle. The charger (20) includes a charger circuit encased in an enclosure having a base (21) covered with a housing (22). The housing of the charger is provided with a first receiving recess (29) which can receive the nose (3a) of the screwdriver and a second receiving recess (30) which can receive the protrusion (7) of the screwdriver. The system additionally includes a pair of charge terminals of the charger circuit that resiliently projects into the second receiving recess (30). The charger circuit terminals are brought into electrical contact with the corresponding terminals in the protrusion of the impact screwdriver when the screwdriver is set on the charger. While the battery unit is charged, the entire impact screwdriver (1), not the battery unit alone, is set on the charger (20) with the nose placed in the first receiving recess and the protrusion in the second receiving recess.

REFERENCES:
patent: 4225814 (1980-09-01), Gantz et al.
patent: 5213913 (1993-05-01), Anthony, III et al.
patent: 5354215 (1994-10-01), Viracola
patent: 5525889 (1996-06-01), Chan et al.
patent: 5769657 (1998-06-01), Kondo et al.

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