A battery-powered portable personal fan is described with reference to two embodiments, both of which comprise a two-part base, of which the upper part is provided with an elongate neck to which a ball-shaped motor housing is pivotally attached. The motor housing contains a motor having a drive shaft which drives a two-blade at least 5000 RPM on a high-speed setting. In one embodiment, a rechargeable lithium ion battery is permanently mounted in the upper base portion and the lower base portion, available in multiple configurations is hollow so as to be useful as a storage area. It is preferably arranged so as to fit in one of several available golf cart cup holders. In the alternative embodiment, the lower housing is canister-shaped to receive a replaceable battery cartridge and, where desired, a tripod arrangement of legs for additional stability. Ornamental elastomeric covers can be stretched over the ball-shaped motor housing to visually link the fan to a particular sport.
1. A high-volume output, battery powered portable fan comprising:
a molded plastic base having a vertical axis of symmetry and including a first large diameter portion defining an interior volume bounded on a lower end by a flat bottom to enable the fan to stand unsupported on a table or the like and, on the upper end, by an upwardly narrower neck;
a battery system mounted wholly within the interior volume;
a ball shaped motor housing attached to the neck and containing a high speed DC ball bearing motor having a drive shaft extending outwardly and forwardly of the housing at an angle to the vertical axis, a manually adjustable pivot link attaching said ball shaped housing to the neck so as to permit changes in the pitch angle of the drive shaft;
a light weight two-blade plastic impeller attached to said shaft;
each impeller blade extending radially outwardly along a diameter common the other blade and having integrally formed winglets, said blades being attached to each other only through a hub;
a switch on said base for turning the fan on to selectively turn said impeller blades at a maximum speed of about 5000 RPM thereby to produce a high output air volume; and
a plastic shroud surrounding the impeller and attached to the motor housing;
said shroud having a cage design including a series of concentric rings of different diameters and radial spokes attaching said rings to one another; and
said fan further comprising a screw-on adapter base attachable to said plastic base with threads internally of said plastic base to enable said fan to be mounted within a conventional cup holder.
2. A multi-use battery powered portable fan as defined in claim 1 wherein the battery system comprises in principal part a rechargeable battery permanently installed in the first base portion, said base portion being further provided with a charging port electrically connected to the battery for charging same.
3. A battery powered portable fan as defined in claim 1 further comprising an elastomeric flexible ornamental cover stretchably attachable to and over said ball-shaped motor housing to create the appearance of a sport article.