Cannister and upright vortex vacuum cleaners

#The present invention relates initially, and thus generally, to an improved cannister and upright vacuum cleaner. More specifically, the present invention relates to an improved cannister and upright vacuum cleaners that utilize a toroidal vortex such that the fluid flow within the vacuum cleaner housing is contained therein. The present invention prevents dust within the device from escaping into the surrounding atmosphere. Therefore, a simple, lightweight, and efficient cannister and upright vacuum cleaners is disclosed.

#The use of vortex forces is known in various arts, including the separation of matter from liquid and gas effluent flow streams, the removal of contaminated air from a region and the propulsion of objects. However, toroidal vortex flow has not previously been provided in a bagless vacuum device having light weight and high efficiency.

#The prior art is strikingly devoid of references dealing with toroidal vortices in a vacuum cleaner application. However, an Australian reference has some similarities. This Australian reference does not approach the scope of the present invention, it is worth disusing its key features of operation so that one skilled in the art can readily see how its shortcomings are overcome by that which is disclosed herein.

#A further understanding of the present invention can be obtained by reference to a preferred embodiment set forth in the illustrations of the accompanying drawings. Although the illustrated embodiment is merely exemplary of systems for carrying out the present invention, both the organization and method of operation of the invention, in general, together with further objectives and advantages thereof, may be more easily understood by reference to the drawings and the following description. The drawings are not intended to limit the scope of this invention, which is set forth with particularity in the claims as appended or as subsequently amended, but merely to clarify and exemplify the invention.

#For a more complete understanding of the present invention, reference is now made to the following drawings in which:

#FIG. 1, already discussed, depicts the establishment of the coanda effect (PRIOR ART);

#As required, a detailed illustrative embodiment of the present invention is disclosed herein. However, techniques, systems and operating structures in accordance with the present invention may be embodied in a wide variety of forms and modes, some of which may be quite different from those in the disclosed embodiment. Consequently, the specific structural and functional details disclosed herein are merely representative, yet in that regard, they are deemed to afford the best embodiment for purposes of disclosure and to provide a basis for the claims herein which define the scope of the present invention. The following presents a detailed description of a preferred embodiment (as well as some alternative embodiments) of the present invention.

#Certain terminology will be used in the following description for convenience in reference only and will not be limiting. The words “in” and “out” will refer to directions toward and away from, respectively, the geometric center of the device and designated and/or reference parts thereof. The words “up” and “down” will indicate directions relative to the horizontal and as depicted in the various figures. The words “clockwise” and “counterclockwise” will indicate rotation relative to a standard “right-handed” coordinate system. Such terminology will include the words above specifically mentioned, derivatives thereof and words of similar import.

#A toroidal vortex is a donut of rotating air. The most common example is a smoke ring. It is basically a self-sustaining natural phenomenon. FIG. 7 shows a toroidal vortex 700, at an angle, and sliced in two to illustrate the airflow 701. In a section of the vortex, a particular air motion section is shown by a stream tube 702, in which the air constantly circles around. Here it is shown with a mean radius 703 and mean speed 704. Circular motion is maintained by a pressure differential across the stream tube, the pressure being higher on the outside than the inside. This pressure difference Δp is, by momentum theory, Δp=ρV2/R where ρ is the air density, R is radius 703 and V is velocity 704. Thus the pressure decreases from the outside of the toroid to the center of the cross section, and then increases again towards the center of the toroid. The example shows air moving downwards on the outside of the toroid 700, but the airflow direction can be reversed for the function and pressure profile to remain the same. The downward outside motion is chosen because it is the preferred direction used in the toroidal vortex vacuum cleaner of the present invention.