Air cooled rasp

Claim 1

A ROTATABLE RASP COMPRISING A PLURALITY OF COAXIALLY ALIGNED SPACER RINGS DEFINING AN INNER OPEN PORTION, RASP BLADES REMOVABLY INTERPOSED BETWEEN PERIPHERAL END FACE PORTIONS OF ADJACENT RINGS AND EXTENDING RADIALLY OUTWARD THEREFROM, SAID RINGS HAVING OUTWARDLY EXTENDING OPENENDED CHANNELS IN PERIPHERAL FACE PORTIONS OPPOSING FACES OF ASSOCIATED RASP BLADES, SAID CHANNELS COMMUNICATING SAID INNER OPEN PORTION WITH THE OUTER PERIPHERY OF SAID RINGS ADJACENT SAID BLADES, A PAIR OF HEADS COAXIALLY ALIGNED WITH SAID RINGS AND ENGAGED WITH THE OUTERMOST ONES THEREOF, ONE OF SAID HEADS HAVING OPENING THEREIN, AND ONE OF SAID HEADS HAVING VANES COMMUNICATING WITH THE INNER OPEN PORTIONS DEFINED BY SAID RINGS, SAID VANES BEING OPERATIVE ON ROTATION OF THE RASP TO FORCE FLUID FROM SAID INNER OPEN PORTION INTO AND OUTWARDLY THROUGH SAID CHANNELS, AND MEANS SECURING SAID HEADS, RINGS, AND BLADES TOGETHER.