The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 2010
Filed:
Oct. 03, 2008
Jason Douglas Allaire, Methuen, MA (US);
Donald Paul Russell, Kingston, NH (US);
Jason Douglas Allaire, Methuen, MA (US);
Donald Paul Russell, Kingston, NH (US);
Lawrence Pumps, Inc., Lawrence, MA (US);
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.