Fan hub

Claim 1

IN A DEVICE OF THE CLASS A DRIVEN MEMBER HAVING A GENERALLY CIRCULAR PERFORATION THEREIN WITH REENTRIES IN THE WALL FORMING SAID PERFORATION, A HOLLOW HUB FORMED OF RESILIENT MATERIAL MOUNTED IN SAID APERTURE AND COMPRISING A ROUND TAPERED PORTION EXTENDING OUTWARDLY FROM ONE SIDE OF SAID DRIVEN MEMBER, A FLANGE ON THE OTHER SIDE OF SAID DRIVEN MEMBER, AND A SHORT CYLINDRICAL PORTION HAVING SUBSTANTIALLY THE SAME DIAMETER AS SAID APERTURE ENTERED IN SAID APERTURE, SAID ROUND TAPERED PORTION BEING OF LARGER DIAMETER THAN SAID APERTURE AT ITS END ADJACENT SAID ONE SIDE OF SAID DRIVEN MEMBER AND DIMINISHING OUTWARDLY TO A DIAMETER SMALLER THAN SAID APERTURE, WHEREBY A SHOULDER IS FORMED ON SAID HUB AT SAID ONE SIDE OF SAID DRIVEN MEMBER, RADIAL DRIVING PORTIONS FORMED ON SAID HUB EXTENDING LONGITUDINALLY FROM SAID FLANGE AND PASSING THROUGH SAID APERTURE WALL RE-ENTRIES IN CLOSE FIT RELATIONSHIP, SAID SHORT CYLINDRICAL HUB PORTION BEING LONGER THAN THE THICKNESS OF SAID DRIVEN MEMBER, AND SAID FLANGE HAVING A CIRCUMFERENTIAL RIM PROJECTING FROM THE INNER FACE THEREOF AND ENGAGING SAID OTHER SIDE OF SAID DRIVEN MEMBER, SAID HOLLOW HUB HAVING SUFFICIENT RESILIENCE TO PERMIT PASSING SAID ROUND TAPERED PORTION THEREOF THROUGH SAID APERTURE WITHOUT PERMANENT DEFORMATION THEREOF AND SAID CIRCUMFERENTIAL RIM EXTENDING SUFFICIENTLY FROM THE INNER FACE OF SAID FLANGE TO RESULT IN SOME DISTORTION OF SAID FLANGE WHEREBY SAID SHOULDER AND SAID CIRCUMFERENTIAL RIM BEAR FIRMLY AGAINST THE OPPOSITE SIDES OF SAID DRIVEN MEMBER.