Patent ID: 7690176

Claim:
A hydraulic cutter device, comprising: a rotatable base including a plurality of spaced cutter teeth; a protective shield covering at least a portion of said base; a cooler housing located outside of said protective shield and cooperating with said shield to form a substantially enclosed air chamber therebetween; a fluid cooler located within said cooler housing adjacent said protective shield, and defining a window for movement of ambient air therethrough; said air chamber having an inlet designed for directing airflow through the window of said fluid cooler, and an outlet downstream of said fluid cooler and communicating with an interior of said protective shield, wherein the outlet of said air chamber comprises at least one slotted vent formed with said protective shield; and a hydraulic motor adapted for rotating said base, and comprising a plurality of hydraulic lines communicating with said fluid cooler; and whereby, rotation of said base causes ambient air flow into and through said fluid cooler to cool fluid moving into and from said hydraulic motor.