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:
Apr. 25, 2000
Filed:
Sep. 02, 1998
Peter Hergt, County of Frankenthal, DE;
Graeme R Addie, Augusta, GA (US);
Robert J Visintainer, Augusta, GA (US);
GIW Industries, Inc., Grovetown, GA (US);
Abstract
A centrifugal slurry pump including a specifically designed impeller having circumferentially spaced vanes mounted between a back disc-shaped shroud and a front open annular shroud. The vanes are thick in cross-section for wear-resistance and channels between adjacent vanes permitting a relatively large spherical objects, such as rocks which are encountered during dredging operations, to pass therethrough, the objects having a diameter of in excess of 15 inches, while maintaining an efficiency in excess of 80% and a head in excess of 30 feet. The vanes further preferably have a mixed pitch and a negative overlap with quite large channels between adjacent vanes so as to pass the large spherical objects.