Abstract: Disclosed is a hub assembly for resiliently mounting a driven element such as a fan, blower wheel or the like on a motor shaft. The body portion of the hub is particularly adapted to be formed by die casting and use of a simple, pressed-on fastener to clamp the resilient members, fan spider and hub body together results in a hub assembly requiring only a minimum of manufacturing and assembly operations.

Abstract: An air impeller of molded plastic construction includes a plurality of similar circumaxially arranged air moving blades and a central hub section. At the hub section, a plurality of similar axially projecting flexible fingers are formed integrally and arranged in a circumaxially spaced series to form a collet which defines a cylindrical hub cavity. A metal hub of cylindrical form and apertured centrally is disposed in the cavity and has a set screw for positive connection with a drive shaft entered in its central aperture. An arcuate clamping ring disposed about the fingers urges the fingers radially inwardly into engagement with the hub and thus retains the hub in the cavity. Radially aligned gaps in the fingers and the clamping ring receive an outer end portion of the set screw to lock the hub and clamping ring against rotation relative to the fingers. Lips may be provided at outer end portions of the fingers and a radial wall at an opposite end of the hub cavity cooperates to secure the hub axially.