Solid material comminution or disintegration – Apparatus – Including means applying fluid to material
Reexamination Certificate
2008-10-03
2010-10-12
Miller, Bena (Department: 3725)
Solid material comminution or disintegration
Apparatus
Including means applying fluid to material
C241S241000, C241S260100, C241S261000
Reexamination Certificate
active
07810747
ABSTRACT:
A device for reducing solids and increasing pressure in a fluid handling system has comminution and inducer sections in a housing upstream of a pump impeller. A rotor has a hub with a small inlet diameter and a larger outlet diameter and a helical rotor blade with its blade pitch angle progressively increasing from inlet to outlet as a polynomial function. The comminutor section has a larger diameter than the inducer section and comminutor vanes extending inward forming a vane edge effective diameter equal to the inducer section diameter. The rotor blade turning within the closing fitting cage of vane edges provides a crushing and shearing action to solids in the fluid flow. Cutouts on the blade edge provide additional crushing and shearing action against the vanes. The fluid passageway sectional area at the outlet is bigger than the throat of the downstream main impeller.
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Allaire Jason Douglas
Russell Donald Paul
Lawrence Pumps Inc.
Miller Bena
Vern Maine & Associates
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