Radial flow fan

Claim 1

AN AIR MOVING DEVICE COMPRISING, A HOUSING HAVING A BASE WALL, A FIRST WALL IN SAID HOUSING PARALLEL TO SAID BASE WALL AND HAVING AN UNOBSTRTUCTED ANNULAR INLET OPENING THEREIN, A FAN BLADE ASSEMBLY SUPPORTED ADJACENT SAID BASE WALL WITHIN SAID HOUSING AND IN ALIGNMENT WITH SAID OPENING, SAID ASSEMBLY INCLUDING A SUPPORT DISK HAVING A SMOOTH CONVEX SURFACE ON ONE SIDE THEREOF AND A REAR SIDE CLOSELY ASSOCIATED WITH SAID BASE WALL, MEANS MOUNTING SAID DISK FOR ROTATION ABOUT AN AXIS EXTENDING THROUGH THE CENTER OF SAID DISK AND PARALLEL TO THE AXIS OF SAID OPENING, A PLURALITY OF AIR MOVEMENT INDUCING BLADES RIGIDLY SECURED TO SAID CONVEX SURFACE OF SAID DISK AND EXTENDING PARTIALLY THROUGH THE OPENING, SAID BLADES EACH HAVING A BASE PORTION AND A GENERALLY TRIANGULAR SHAPED BODY PORTION, EACH OF SAID BASE PORTIONS EXTENDING GENERALLY RADIALLY FROM NEAR THE OUTER PERIPHERY OF SAID SUPPORT DISK TO A POINT SPACED FROM THE CENTER OF SAID DISK TO DEFINE A SMOOTH VANELESS CENTER PORTION ON SAID DISK, SAID BODY PORTION OF SAID BLADES BEING SMOOTHLY CURVED IN THE DIRECTION OF ROTATION OF SAID DISK WITH THE LEADING APEX THEREOF EXTENDING GENERALLY IN THE DIRECTION OF ROTATION OF SAID DISK, EACH OF SAID BODY PORTIONS HAVING A FIRST SECTION WHICH EXTENDS THROUGH SAID OPENING FROM ONE SIDE THEREOF FOR EFFECTING AXIAL AIR INTAKE TO SAID DISK AND A SECOND SECTION BETWEEN SAID FIRST SECTION AND SAID DISK FOR COOPERATION WITH SAID SMOOTH SURFACE OF SAID DISK TO EFFECT THE RADIAL DISCHARGE OF THE AIR DRAWN INTO SAID HOUSING IN A DIRECTION BETWEEN AND PARALLEL TO SAID BASE AND FIRST WALLS AND SUBSTANTIALLY PERPENDICULAR TO SAID AXIS OF ROTATION OF SAID DISK.