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Patent Searching and Data


Title:
IMPACT TOOL
Document Type and Number:
WIPO Patent Application WO/2013/145697
Kind Code:
A1
Abstract:
An impact tool comprises an end-bit holding section (3a) and a driving source (2). The end-bit holding section is formed with a hole (3a) for receiving an end bit (12), the hole having a center axis defining an axial direction, the hole having one end in the axial direction functioning as an end-bit insertion opening (3c) for passing the end bit therethrough, the hole having a generally polygonal cross section perpendicular to the axial direction. The driving source is configured to rotate the end-bit holding section. An arc-shaped cutout (3g) is formed at each apex angle of the hole in proximity to the end-bit insertion opening such that the arc-shaped cutout has a largest arc dimension at the opening (3c) and the arc dimension decreases gradually from the opening toward another end of the hole in the axial direction.

Inventors:
TAO NORIHIDE (JP)
INAGAWA HIROTO (JP)
WATANABE HIDEKI (JP)
Application Number:
PCT/JP2013/002016
Publication Date:
October 03, 2013
Filing Date:
March 25, 2013
Export Citation:
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Assignee:
HITACHI KOKI KK (JP)
International Classes:
B25B21/00; B25B13/06; B25B21/02; B25B23/00
Foreign References:
JP2011104665A2011-06-02
JP2010253577A2010-11-11
US5092203A1992-03-03
US7228764B12007-06-12
JP2010253577A2010-11-11
Attorney, Agent or Firm:
KITAZAWA, Kazuhiro et al. (31-14 Yushima 2-chome, Bunkyo-k, Tokyo 34, JP)
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