Apparatus for sharpening a circular blade

An apparatus for sharpening a circular blade comprising:

• a platform and base assembly comprising a rail and a horizontally extending slidable base capable of forward and rearward movement along said rail;
• a standard;
• an adjustable tool holder carried by said standard, said tool holder comprising a rotatable shaft supported for rotation and a main body that is angularly adjustable;
• a blade holder comprising a slidable locking cam for releasably locking said circular blade to said adjustable tool holder in a plane perpendicular to a longitudinal axis of said rotatable shaft of said tool holder;
• and
• a power-driven sharpening wheel.

An apparatus for sharpening a circular blade comprising:

• a platform and base assembly;
• a slidable standard capable of forward and rearward movement along said platforrn and base assembly;
• an adjustable tool holder carried by said slidable standard, said tool holder comprising a rotatable shaft supported for rotation, and a main body that is angularly adjustable;
• a locking member comprising:
• a removable blade-centering pin having an enlarged head on its remote end;
• and a compressible member, wherein longitudinal force is applied to said blade-centering pin so that said enlarged head of said blade-centering pin compresses said compressible member against an outer surface of said circular blade for securely holding said circular blade on said adjustable tool holder in a plane perpendicular to a longitudinal axis of said rotatable shaft of said tool holder;
• and
• a power-driven sharpening wheel.