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Title:
POWER SUPPLY DEVICE FOR POWER TOOL
Document Type and Number:
WIPO Patent Application WO/2011/162357
Kind Code:
A1
Abstract:
A power supply device for a power tool is provided with: an adapter that electrically connects to a power tool; a fuel cell that generates power that is supplied to the power tool via the adapter by causing an oxidative reaction between fuel and an oxidizing agent; and a charger for charging a rechargeable battery, which connects to the power tool and supplies power to the power tool, with power generated by the fuel cell. The adapter can be separated from the power tool. According to a connection determination device that determines whether the adapter and power tool are connected, the charger implements a first charging mode when the adapter and power tool are not connected, and implements a second charging mode that charges at a lower voltage and lower current than those of the first charging mode when the adapter and power tool are connected.

Inventors:
UMEMURA TAKUYA (JP)
YAMADA TORU (JP)
SUZUKI HITOSHI (JP)
Application Number:
PCT/JP2011/064458
Publication Date:
December 29, 2011
Filing Date:
June 23, 2011
Export Citation:
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Assignee:
MAKITA CORP (JP)
UMEMURA TAKUYA (JP)
YAMADA TORU (JP)
SUZUKI HITOSHI (JP)
International Classes:
H02J7/00; B25F5/00
Domestic Patent References:
WO2008126685A22008-10-23
Foreign References:
JP2008132549A2008-06-12
JP2008132551A2008-06-12
JP2001145276A2001-05-25
Other References:
See also references of EP 2586572A4
Attorney, Agent or Firm:
NAGOYA INTERNATIONAL PATENT FIRM (JP)
Nagoya international patent business corporation (JP)
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