Loading patent…
AssigneeC.M.E. Blasting & Mining Equipment Ltd.
InventorsBo Thomas SJOLANDER, Bjorn SJOLANDER
Estimating the term…
A grinding cup for detachable connection to the output drive shaft of a grinding machine for grinding buttons on drill bits or cutters, said grinding cup having top and bottom surfaces and consisting of a lower grinding section and an upper body section with a centrally disposed recess formed in the bottom surface of the grinding section; said body section having a centrally disposed upright drive section formed on the top surface of the grinding cup, said drive section shaped and sized to both driveably engage within a corresponding recess at end of the output drive shaft and provide axial and radial support and retaining means for detachably connecting the grinding cup to the output drive shaft wherein said drive section has a non-circular cross section and is tapered from the top surface of the grinding cup to the free end of the drive section.
A grinding cup for detachable connection to the output drive shaft of a grinding machine for grinding buttons on drill bits or cutters, said grinding cup having top and bottom surfaces and consisting of a lower grinding section and an upper body section co-axial with said grinding section to form said grinding cup with a centrally disposed recess formed in the bottom surface of the grinding section having the desired profile for the button to be ground;
A holder device for detachable connection of a grinding cup to a grinding machine, said grinding machine having a pneumatically, hydraulically or electrically driven motor which drives an output shaft, the holder device comprising a rotatable drive member having a free end adapted to extend axially away from the the grinding machine, a non-circular recess in the free end of the drive member with a coaxial passageway extending from the recess the length of the drive member or part thereof and through which coolant fluid may be directed to a grinding cup supported thereon, the cross-section of the recess being tapered inwardly from the free end of the drive member.
Dependencies are inferred from the claim text.