Patent ID: 8128323

Claim:
A driven tool assembly comprising: a housing having at least one coolant intake port, at least one coolant discharge port, and a shank for mounting the driven tool assembly to a machine tool, an input shaft rotatably mounted in said housing, a seal disposed between said housing and said input shaft, an output shaft rotatably mounted in said housing, a transmission communicating with said input shaft and with said output shaft, whereby said transmission transmits power from said input shaft to said output shaft, at least one passageway in fluid communication with said coolant intake port and said coolant discharge port, said passageway also in fluid communication with said input shaft, said output shaft, and said transmission, whereby coolant lubricates and cools said shafts and said transmission while flowing from said coolant intake port to said coolant discharge port, and said coolant discharge port positioned remote from said output shaft.