EP 0153300 B1 19881130 - DEVICE FOR SHARPENING TWIST DRILLS
Title (en)
DEVICE FOR SHARPENING TWIST DRILLS
Publication
Application
Priority
AT 46384 A 19840214
Abstract (en)
[origin: ES8602467A1] The cup-shaped grinding wheel is supported by a spindle which can be inserted into a drill chuck, used as a driving unit. It carries a flanged plate (14) forming a drill guide. This plate has a ring of holes (19) if different sizes for a range of drill (22) diameters. Under the plate are two inner plates (15,16), the lower plate (16) having shaped openings (21) matching the drill shape. - The upper plate has stop lugs (17) projecting downwards towards the rim (29) of the grinding wheel. The lugs are of a metal which is harder than the material of the grinding wheel, and have sloping edges (17a,b) which match the sloping parts of the grinding wheel rim. The grinding wheel is resiliently supported.
[origin: ES8602467A1] The cup-shaped grinding wheel is supported by a spindle which can be inserted into a drill chuck, used as a driving unit. It carries a flanged plate (14) forming a drill guide. This plate has a ring of holes (19) if different sizes for a range of drill (22) diameters. Under the plate are two inner plates (15,16), the lower plate (16) having shaped openings (21) matching the drill shape. - The upper plate has stop lugs (17) projecting downwards towards the rim (29) of the grinding wheel. The lugs are of a metal which is harder than the material of the grinding wheel, and have sloping edges (17a,b) which match the sloping parts of the grinding wheel rim. The grinding wheel is resiliently supported.
IPC 1-7
IPC 8 full level
B24B 3/26 (2006.01)
CPC (source: EP US)
B24B 3/26 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0153300 A2 19850828; EP 0153300 A3 19861230; EP 0153300 B1 19881130; AT 380418 B 19860526; AT A46384 A 19851015; AT E38952 T1 19881215; CA 1236697 A 19880517; DE 3566510 D1 19890105; ES 540322 A0 19851201; ES 8602467 A1 19851201; JP S60180756 A 19850914; JP S6339377 B2 19880804; US 4574528 A 19860311
DOCDB simple family (application)
EP 85890036 A 19850213; AT 46384 A 19840214; AT 85890036 T 19850213; CA 474149 A 19850213; DE 3566510 T 19850213; ES 540322 A 19850212; JP 2457085 A 19850213; US 70050885 A 19850211