Title:
ROTATIONAL IMPACT TOOL
Document Type and Number:
WIPO Patent Application WO/2014/049912
Kind Code:
A1
Abstract:
A rotational impact tool including: a motor (4); a spindle (23); a hammer (6); a first resilient member (22); and an anvil (7). The motor generates a drive force. The spindle rotates in a rotating direction upon transmission of the drive force from the motor. The spindle has an axis extending in an axial direction that includes a first direction and a second direction opposite to the first direction. The hammer moves in the rotational direction and in the axial direction relative to the spindle to generate a rotational impact force. The first resilient member urges the hammer in the first direction. The anvil transmits the rotational impact force to an end bit. The rotational impact tool further includes a second resilient member (21). The second resilient member is disposed at a position radially outward of the first resilient member and is configured to abut the hammer when the hammer moves in the second direction.
Inventors:
TADOKORO NAOKI (JP)
SAKAI HIRONORI (JP)
SAKAI HIRONORI (JP)
Application Number:
PCT/JP2013/003473
Publication Date:
April 03, 2014
Filing Date:
June 03, 2013
Export Citation:
Assignee:
HITACHI KOKI KK (JP)
International Classes:
B25B21/02
Foreign References:
| GB1303571A | 1973-01-17 | |||
| EP2335881A1 | 2011-06-22 | |||
| JP2006175553A | 2006-07-06 | |||
| JP2010076022A | 2010-04-08 | |||
| JP2007152448A | 2007-06-21 |
Attorney, Agent or Firm:
KITAZAWA, Kazuhiro et al. (31-14 Yushima 2-chome, Bunkyo-k, Tokyo 34, JP)
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