(19)
(11) EP 0 181 104 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.08.1988 Bulletin 1988/34

(43) Date of publication A2:
14.05.1986 Bulletin 1986/20

(21) Application number: 85307436

(22) Date of filing: 16.10.1985
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 05.11.1984 JP 23282684

(71) Applicants:
  • ASAHI DIAMOND INDUSTRIAL CO. LTD.
     ()
  • NISSEI INDUSTRIAL CO., LTD.
     ()

(72) Inventors:
  • Kobayashi, Shoji
     ()
  • Nishio, Kiyoshi
     ()

   


(54) Cup-type grinding wheel


(57) A cup-type grinding wheel comprising an annular- . shaped grinding body (11) eccentrically mounted on a wheel spindle stock (18) having a coaxis (23) with a non-eccentric rotary axis (22). In this way, only the grinding body (11) is eccentrically rotated to flatly grind the whole grinding surface without producing a projection (hitherto 20) at the central portion of a workpiece (12) to be ground.






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