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Machine translation
1. (WO2008092386) STEP DRILL WITH A SPIRAL-FORM GROOVE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2008/092386    International Application No.:    PCT/CN2008/000221
Publication Date: 07.08.2008 International Filing Date: 29.01.2008
IPC:
B23B 51/00 (2006.01), B23B 51/12 (2006.01)
Applicants: ZHANG, Qi [CN/CN]; (CN)
Inventors: ZHANG, Qi; (CN)
Agent: NANJING ZHONGLIAN PATENT AGENCY CO., LTD.; Jiangsu Jixie Building No.49, Zhongshan North Road Nanjing Jiangsu 210008 (CN)
Priority Data:
200710019664.2 29.01.2007 CN
Title (EN) STEP DRILL WITH A SPIRAL-FORM GROOVE
(FR) FORET ÉTAGÉ À RAINURE SPIRALE
(ZH) 单槽宝塔钻
Abstract: front page image
(EN)A step drill includes a body with an integrally formed handle, in which a spiral-form groove extends from the end to the front of the body, and the groove bottom is a paraboloidal structure. The combination surface of adjacent diameter is concave arc surface, or the combination surface of adjacent diameter is inclined surface, and the angle between the diameter of one side and the inclined surface is 43-47 degree.
(FR)La présente invention concerne un foret étagé à queue intégrée, dans lequel une rainure spirale court de l'extrémité à la partie antérieure du corps, le fond de rainure étant de structure paraboloïdale. La surface de combinaison de diamètre adjacent est une surface d'arc concave, ou bien la surface de combinaison de diamètre adjacent est une surface inclinée, et l'angle entre le diamètre d'un côté et la surface inclinée fait de 43 à 47 degrés.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, NO, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: Chinese (ZH)
Filing Language: Chinese (ZH)