Patent ID: 8029341

Claim:
A polishing tool ( 1 ) for finishing an ophthalmic lens, comprising: a drive plate ( 4 ) equipped with means ( 2 ) for mounting the drive plate on a spindle of a polishing machine; a removable polishing pad ( 5 ) adapted to be driven in rotation by the drive plate ( 4 ); wherein the drive plate and polishing pad include positioning means ( 9 , 13 ) for radially immobilizing said pad ( 5 ) with respect to said plate ( 4 ) and enabling axial sliding of the pad ( 5 ) with respect to the plate ( 4 ); the drive plate and polishing pad including retaining means ( 10 , 14 ) limiting the axial sliding of the pad ( 5 ) with respect to the plate ( 4 ) to a pre-determined sliding range; and the drive plate and polishing pad further including rotational locking means, including at least one tooth ( 11 ) adapted to engage in a slot of corresponding shape, the tooth ( 11 ) and the slot ( 15 ) being disposed one on the plate ( 4 ) and the other on the pad ( 5 ), wherein on engagement of the polishing pad in the retaining means the tooth engages the slot only when pressure is applied between the drive plate and polishing pad to rotationally lock polishing pad with drive plate.