Patent ID: 6966824

Claim:
Apparatus for releasably securing a grinding wheel or a group of grinding wheels in a spectacle-lens edging machine, comprising: a wheel spindle having an axis and a bore extending along the axis; a grinding-wheel-retaining shaft arranged with a close fit in the bore of the wheel spindle and being displaceable in the bore along the axis of the wheel spindle, the grinding wheel retaining shaft having a free end toward a grinding wheel; at least one grinding wheel on the free end of the grinding-wheel-retaining shaft, the at least one grinding wheel having a width along the axis of the wheel spindle, the grinding-wheel-retaining shaft being displaceable in the bore of the wheel spindle by at least the width of the grinding wheel; a retaining disk releasably secured to the free end of the grinding-wheel-retaining shaft for retaining the at least one grinding wheel; and a clamping arrangement operable to axially release and retract the grinding-wheel-retaining shaft into the bore of the wheel spindle by at least the width of the at least one grinding wheel; wherein displacement of the grinding-wheel-retaining shaft into the bore of the wheel spindle in one axial direction axially braces the at least one grinding wheel between the wheel spindle and the retaining disk, and in an opposite axial direction releases the retaining disk from the wheel spindle and wherein displacement of the grinding-wheel-retaining shaft into the bore of the wheel spindle in said one axial direction by at least the width of the at least one grinding wheel releases said at least one grinding wheel from the grinding-wheel-retaining shaft.