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Title:
ELECTRIC TOOL AND METHOD OF DRIVING ELECTRIC TOOL
Document Type and Number:
WIPO Patent Application WO/2012/118220
Kind Code:
A3
Abstract:
When a work stops without driving after a voltage across a capacitor circuit reaches a target boost voltage, a microcomputer switches an FET through a driver circuit. As a result, the voltage charged in the capacitor circuit is charged in a secondary battery through the FET, an inductance, and a parasitic diode of an FET.

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Inventors:
SHIMA YUKIHIRO
FUNABASHI KAZUHIKO
Application Number:
PCT/JP2012/055504
Publication Date:
July 04, 2013
Filing Date:
February 28, 2012
Export Citation:
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Assignee:
HITACHI KOKI KK (JP)
SHIMA YUKIHIRO
FUNABASHI KAZUHIKO
International Classes:
B25C1/06; B25F5/00
Domestic Patent References:
WO2001089055A12001-11-22
Foreign References:
DE3426072A11986-01-30
EP2081275A12009-07-22
US20090189581A12009-07-30
US20090237057A12009-09-24
KR20050027736A2005-03-21
Attorney, Agent or Firm:
Shin-Ei Patent Firm, P.C. (7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, JP)
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