Abstract: A combination push bumper/bike rack for use with police or other emergency vehicles for situations when a disabled vehicle may need pushing, a bike may need to be transported or both. The push bumper is attached to the original bumper of a vehicle and spaced in front of such original bumper to prevent damage to the vehicle when it pushes other vehicles. At the top portion of the push bumper are a pair of retractable arms with straps that can be deployed using a push button. When the retractable arms are not in use they remain flush with the push bumper. When the retractable arms are deployed that are positioned substantially perpendicular to the push bumper and are capable of carrying a bicycle thereon with straps to secure them thereto.

Abstract: An apparatus is provided that includes a bladed device having a hub which is rotatable about an axis and one or more blades attached to the hub by self-energizing, self-locking, insertion and retention features which are formed integrally with the blade and hub. The insertion and retention features include a locking tang formed integrally with the root of the blade, and detent features which are part of the locking tang and hub. As the blade is inserted axially into the hub, the locking tang deflects radially inward and then snaps radially outward by spring action of the tang to engage the detent feature of the hub, and thereby lock the blade against further axially or radially movement with respect to the hub. The locking tang is oriented and configured in such a manner that the locking tang is self-energizing, thereby causing the tang to grip the hub more tightly as rotational speed of the bladed device increases.