Patent ID: 8920134

Claim:
A hermetic compressor ( 1 ) comprising a casing ( 2 ) carrying movable elements therein, an oil sump ( 3 ) forming the lower portion of the casing ( 2 ) and wherein oil (Y) is put providing the lubrication of the movable elements, an electric motor having a rotor ( 4 ) and a stator, a piston ( 5 ) providing the delivery of a refrigerant fluid in pressurized state to a refrigeration system, a cylinder block ( 6 ) disposed at the upper side of the rotor ( 4 ), a crankshaft ( 7 ) supported by the cylinder block ( 6 ), and an oil pickup tube ( 9 ) mounted to the rotor ( 4 ) by press-fit assembling method, the lower end of which is immersed into the oil (Y) in the oil sump ( 3 ) and which delivers the oil (Y) to the crankshaft ( 7 ) by sucking from the oil sump ( 3 ), and characterized by a hydrodynamic coupling ( 10 ) that transfers the rotational movement of the rotor ( 4 ) from the oil pickup tube ( 9 ) to the crankshaft ( 7 ) by being connected between the upper end of the oil pickup tube ( 9 ) and the lower end of the crankshaft ( 7 ), wherein the hydrodynamic coupling is fed by the oil sucked from the oil sump by the oil pickup tube.