Geared power transmission equipment, machine coupling and transmission components, geared multidrives, speed reducers, agricultural machinery, gearboxes, industrial machinery gearboxes, power take off shafts, cardan shafts, mechanical driveline equipment, universal joints, clutches, safety covers for use in conjunction with power take off shafts and cardan shafts, torque limiters, hydraulic pumps, hydraulic motors, hydraulic control valves, pump drives, couplings for agricultural implements, axles for machines, wheel hubs being parts of machines, hydraulic cylinders (machines or parts of machines, hydraulic jacks, hoists, electric winches, winches, winches incorporating a lock