Grinding machine for ring-like workpieces

Claim 1

A MACHINE FOR PERIPHERAL GRINDING OF A RING-LIKE WORKPIECE INCLUDING A DRIVEN GRINDING WHEEL AND A WORKHEAD WHICH ARE RELATIVELY MOVABLE, THE WORKHEAD HAVING A DRIVEN SPINDLE AND A DRIVING DISK SECURED TO ONE END THEREOF; AN ARBOR COMPRISING A CYLINDRICAL FLANGE AND A COAXIAL FORWARDLY PROJECTING SHANK, MEANS FOR EXERTING A DRIVING CONNECTION BETWEEN THE DISK AND FLANGE WHEN IN SURFACE CONTACT BUT PERMITTING LIMITED RADIAL MOVEMENT OF THE FLANGE RELATIVE TO THE DISK, A SLEEVE MOUNTED ON SAID SHANK, SAID ARBOR DEFINING A CLOSED FLUID SYSTEM FOR EXERTING OUTWARD PRESSURE ON THE SLEEVE, MEANS FOR SELECTIVELY VARYING THE PRESSURE RESPECTIVELY TO EXPAND THE SLEEVE INTO NON-SLIP ENGAGEMENT WITH THE BORE OF A WORKPIECE TO BE GROUND AND TO RELEASE SAID WORKPIECE FOR REPLACEMENT, AND A PAIR OF CIRCUMAXIALLY SPACED SHOES ENGAGING THE PERIPHERY OF THE ARBOR FLANGE TO SUPPORT THE ARBOR AND WORKPIECE ON AN AXIS INDEPENDENT OF THE SPINDLE WITH THE WORKPIECE IN ENGAGEMENT WITH THE GRINDING WHEEL AND WHILE THE SPINDLE AND DISK ROTATE THE ARBOR AND WORKPIECE ON SAID INDEPENDENT AXIS.