Title:
IMPACT TOOL
Document Type and Number:
WIPO Patent Application WO/2013/140793
Kind Code:
A1
Abstract:
An impact tool includes a casing (13) supporting a tip tool (12), a piston (41) provided in the casing (13), an electric motor (11) provided in the casing (13), a motion converting mechanism (45) provided in the casing (13), and a vibration reducing mechanism (47) provided in the casing (13). The vibration reducing mechanism (47) has a supporting member, which is swingable with using a fixing position (J) as a supporting point and a weight (49) attached to a free end side of the supporting member. In a plane including a center line (C), the gravity center (H) of the weight (49) and the gravity center (G) of the casing (13) are disposed at mutually different locations, and the fixing position (J) is disposed on the side of the gravity center (G) relative to the center line (C).
Inventors:
YAMADA HIDEKI (JP)
OOKUBO TAKAHIRO (JP)
ABE SATOSHI (JP)
OOKUBO TAKAHIRO (JP)
ABE SATOSHI (JP)
Application Number:
PCT/JP2013/001879
Publication Date:
September 26, 2013
Filing Date:
March 19, 2013
Export Citation:
Assignee:
HITACHI KOKI KK (JP)
International Classes:
B25D17/24; B25D17/20
Domestic Patent References:
| WO2007102449A1 | 2007-09-13 |
Foreign References:
| JP2008272897A | 2008-11-13 | |||
| EP2072191A1 | 2009-06-24 | |||
| US20120055689A1 | 2012-03-08 | |||
| US20100270046A1 | 2010-10-28 | |||
| JP2007237301A | 2007-09-20 | |||
| JP2008272897A | 2008-11-13 | |||
| JP2007237304A | 2007-09-20 |
Attorney, Agent or Firm:
TSUTSUI, Yamato (3F Shinjuku Gyoen Bldg., 3-10, Shinjuku 2-chome, Shinjuku-k, Tokyo 22, JP)
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