Patent ID: 8430070

Claim:
A piston ( 10 , 10 ′) for an internal combustion engine, comprising: an upper crown portion ( 16 , 16 ′); a lower crown portion ( 26 , 26 ′) joined to said upper crown portion; an outer cooling gallery ( 31 , 31 ′) formed between said upper crown portion ( 16 , 16 ′) and said lower crown portion ( 26 , 26 ′); an oil inlet ( 50 , 50 ′) communicating directly with said outer cooling gallery ( 31 , 31 ′) for conducting oil into said outer cooling gallery ( 31 , 31 ′); an oil outlet ( 52 , 52 ′) spaced from said inlet ( 50 , 50 ′) and communicating directly with said outer cooling gallery ( 31 , 31 ′) for conducting oil out of said outer cooling gallery ( 31 , 31 ′); and a cooling nozzle ( 54 , 54 ′) formed separately from said upper and lower crown portions and communicating directly with said outlet ( 52 , 52 ′) for conducting at least a portion of oil exiting said outer cooling gallery ( 31 , 31 ′) through said outlet ( 52 , 52 ′) and toward an under-crown surface ( 60 , 60 ′) of the piston.