An impeller couplable to a rotatable drive by way of a rotatable drive attachment region coupled to a generally circularly shaped hub, said generally circularly shaped hub including a downwardly directed progressively tapered volume having coupled thereto a proximal end region of one or more arced blades, said proximal region arranged on said downwardly directed progressively tapered volume in a spiraling pattern where each of said one or more arced blades has an arc with an increasing radius to said arc towards a peripheral edge region of said hub so as to form a periodic pattern, wherein a number of periods corresponds to the number of blades;
- said proximal end region of said one or more increasing radius arced blades extending from said peripheral edge region of said hub along said downwardly directed progressively tapered volume to a predetermined point inward of said peripheral edge region;
- said one or more arced blades further being flared as extending from said proximal end region thereof to a remote distal end region such that the distal end region of each of said one or more increasing radius arced blades, in combination, defines a larger circumference than that of said hub, thereby imparting a generally frusto-conical shape to the impeller.