Air cooled vibrator

Claim 1

VIBRATOR MECHANISM OF THE CLASS DESCRIBED, COMPRISING: A CASING HAVING WALL MEANS INCLUDING FIRST AND SECOND SPACED APART SIDE WALLS; FIRST AND SECOND BEARINGS RESPECTIVELY IN THE SIDE WALLS AND RELATIVELY CLOSELY COAXIALLY SPACED APART ON AN AXIS GENERALLY NORMAL TO SAID SIDE WALLS; SHAFT COAXIALLY JOURNALED IN THE BEARINGS AND HAVING A PORTION EXPOSED AXIALLY THROUGH THE CENTER OF THE SECOND BEARINGS; EACH OF SAID SIDE WALLS HAVING AN AIR INLET OPENING THEREIN PROXIMATE TO ITS BEARING AND SAID WALL MEANS HAVING AN AIR OUTLET OPENING THEREIN RADIALLY OUTWARDLY OF SAID INLET OPENINGS; AND A ROTOR CARRIED BY THE SHAFT WITHIN THE CASING BETWEEN THE BEARINGS AND HAVING A WEIGHT PORTION ECCENTRIC TO THE SHAFT AXIS FOR CAUSING VIBRATORY FORCES DURING ROTATION THEREOF, AND SAID ROTOR INCLUDING AIR MOVING MEANS THEREON IN ADDITION TO THE WEIGHT PORTION AND OF AN AXIAL WIDTH BUT SLIGHTLY LESS THAN THE AXIAL SPACING OF THE BEARINGS; FOR CAUSING AIR TO ENTER THE CASING VIA SAID INLET OPENINGS AND TO LEAVE THE CASING VIA SAID OUTLET OPENING.