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US 6,210,116 B1Granted
High efficiency pump impeller
OwnerJohn E. Kuczaj, Dong Chul Ohinventors
Life of this patent
Estimating the term…
Abstract
An improved pump impeller using both spaced disc stack and radial vanes to establish pumping, the vanes separated to form a circumferential array of convergent spaces. The vanes may be of increasing thickness towards their outer ends to create the convergent spaces, or a cover plate may have a sloping inside surface to accomplish the space convergency.
Claims4
A pump impeller comprising:
- a stack of annular discs aligned on a common axis, said discs spaced apart axially to define interdisc spaces and said discs having a central opening allowing flow of fluid into said interdisc spaces defined between adjacent discs in said stack;
- at least one cover plate disposed on one side of said stack of discs;
- a circumferential array of radial vanes in each interdisc space extending radially outwardly to intersect the outer perimeter of said discs at a steep angle, said vanes spaced apart to define radially extending flow spaces within said interdisc spaces of a convergent shape, being of decreasing cross sectional area in a radially outward direction, whereby both boundary layer and vane pumping action can occur through said flow spaces and said fluid is expelled from said impeller through said minimum cross sectional areas of said flow spaces.
Dependencies are inferred from the claim text.