Blower wheel blade construction and method of assembly

Claim 1

A BLOWER WHEEL OF THE CENTRIFUGAL TYPE COMPRISING A HUB STRUCTURE ROTATABLE ABOUT A CENTRAL AXIS, A PLURALITY OF LONGITUDIANL AIR MOVING BLADES ROTATABLE WITH SAID HUB STRUCTURE, SAID BLADES BEING ARRANGED IN AN ANNULAR SERIES ABOUT SAID HUB STRUCTURE WITH THE LONGITUDINAL AXES THEREOF GENERALLY PARALLEL TO SAID CENTRAL AXIS AND WITH THE OPPOSITE ENDS OF SAID BLADES DISPOSED RESPECTIVELY IN TWO AXIALLY SPACED RADIAL PLANES, A FLANGE ON EACH END OF EACH BLADE EXTENDING FORWARDLY AND RADIALLY OUTWARDLY WITH RESPECT TO THE ASSOCIATED BLADE, MEANS DEFINING AN AXIALLY OUTWARDLY OPENING NOTCH IN EACH END OF EACH BLADE REARWARDLY OF THE ASSOCIATED FLANGE, AND AN AXIALLY INWARDLY DIRECTED TAB ON THE FORWARD PORTION OF EACH OF SAID FLANGES, EACH OF SAID TABS HAVING AN AXIALLY INWARDLY OPENING NOTCH IN THE INNER END THEREOF WHICH ENGAGES IN INTERFITTING RELATIONSHIP THE NOTCH IN THE CORRESPONDING END OF THE NEXT ADJACENT BLADE TO LINK TOGETHER ADJACENT BLADES AND PREVENT RELATIVE CIRCUMFERENTIAL AND AXIAL DISPLACEMENT THEREBETWEEN.