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(11)

EP 2 603 354 A1

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(43) Date of publication: 19.06.2013 Bulletin 2013/25 (21) Application number: 10855763.8 (22) Date of filing: 11.08.2010

(51) International Patent Classification (IPC):  B24B 23/02(2006.01) B24B 55/05(2006.01) (86) International application number: PCT/CN2010/075887 (87) International publication number: WO 2012/019342 (16.02.2012 Gazette 2012/07)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (71) Applicant: Bosch Power Tools (China) Co., Ltd. Zhejiang 310052 (CN)	(72) Inventors: SHEN, Xianghu Hangzhou, Zhejiang 310052 (CN) HU, Min Hangzhou, Zhejiang (CN) LI, Hongbiao Zhengzhou, Henan (CN) (74) Representative: Bee, Joachim et al Robert Bosch GmbH Wernerstrasse 1 Postfach 30 02 20 70442 Stuttgart 70442 Stuttgart (DE)