Blower

Claim 1

A BLOWER IMPELLER COMPRISING A CENTRAL SUBSTANTIALLY FLAT DISC-LIKE HUB PORTION, AN AXLE MEMBER SECURED TO SAID HUB PORTION CENTRALLY THEREOF AND DEFINING THE AXIS OF ROTATION OF THE IMPELLER, AND A PLURALITY OF CIRCUMFERENTIALLY EQUIDISTANTLY SPACED IMPELLER BLADES ON THE HUB PORTION PROJECTING EQUAL DISTANCES RADIALLY THEREFROM, EACH IMPELLER BLADE BEING SUBSTANTIALLY U-SHAPED IN CROSS SECTION AND HAVING A FRONTAL SUBSTANTIALLY FLAT FACE LYING IN A COMMON PLANE WITH THE FRONTAL FACES OF THE OTHER BLADES, SAID PLANE PERPENDICULAR TO THE AXIS OF ROTATION OF THE IMPELLER, EACH IMPELLER BLADE ALSO HAVING OPPOSED SUBSTANTIALLY FLAT SIDES WHICH PROJECT REARWARDLY OF THE FRONTAL FACE SUBSTANTIALLY AT RIGHT ANGLES THERETO, THE REAR EDGES OF SAID SIDES OF ALL BLADES TERMINATING IN A COMMON PLANE PARALLEL TO THE FIRST-NAMED COMMON PLANE SO THAT ALL OF SAID BLADES ARE OF THE SAME DEPTH AXIALLY OF THE IMPELLER, ALL OF SAID BLADES BEING OF THE SAME CIRCUMFERENTIAL WIDTH, SAID CIRCUMFERENTIAL WIDTH BEING SOMEWHAT LESS THAN THE EQUAL CIRCUMFERENTIAL SPACING OF THE BLADES, ONE SIDE OF EACH IMPELLER BLADE BEING RADIALLY SHORTER THAN THE OPPOSITE SIDE THEREOF AND HAVING ITS INNER END TERMINATING A GREATER DISTANCE RADIALLY FROM THE CENTER OF THE IMPELLER THAN SAID OPPOSITE SIDE, THE RADIALLY SHORTER SIDES OF THE BLADES BEING ADJACENT TO THE RADIALLY LONGER SIDES OF THE NEXT BLADE OF THE IMPELLER, WHEREBY SHORT AND LONG IMPELLER BLADE SIDES ARE ALTERNATELY ARRANGED AROUND THE CIRCUMFERENCE OF THE IMPELLER WITH A LESSER CIRCUMFERENTIALLY SPACE BETWEEN SHORT AND LONG SIDES OF EACH BLADE THAN BETWEEN SHORT AND LONG SIDES OF ADJACENT BLADES.