Cone mills

A cone mill drive shaft coupling comprising a universal joint for transferring rotary motion from a motor through an angle to a milling tool.

A cone mill drive shaft comprising two rotatable shaft sections, the sections being positioned at an angle with respect to each other, the shaft comprising a coupling for transferring rotary motion through the angle in use, the coupling comprising a universal joint.

A cone mill comprising a rotating tool for moving friable material across a static conical screen, the tool being driven to rotate by a tool drive shaft, the mill includes a motor, the motor causing rotation of a motor drive shaft, the tool drive shaft and the motor drive shaft being located at an approximately 90 degree angle with respect to each other, the mill comprising a gearless joint for transferring rotary motion from the motor through the angle to the tool, said gearless joint comprising a double universal joint having a first joint and a second joint, each of said joints providing approximately 45 degrees of rotary angle of said 90 degrees between said motor drive shaft and said tool drive shaft.