Patent ID: 7213683

Claim:
A piston lubrication system for a reciprocating compressor with a linear motor, the piston lubrication system comprising: a hermetic shell; an oil sump defined within the hermetic shell; a cylinder affixed within the hermetic shell; a reciprocating piston disposed in the cylinder, the piston comprising: a top region; and a body region; a radial gap defined by the top region and the body region of the piston and the cylinder; a pump supplying lubricant oil from the oil sump to the radial gap, the pump comprising: at least one oil supply duct comprising: a lower end coupled to the pump; and an upper end carried by the piston and opened to the radial gap; at least one oil return duct carried by the piston, the at least one oil return duct comprising: an inlet end opened to the radial gap; and an outlet end opened to the oil sump.