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. 07, 1992
Filed:
Aug. 08, 1990
George A Thompson, Daytona Beach, FL (US);
Other;
Abstract
A volute type centrifugal pump has an impeller rotatably mounted in a volute chamber of the pump casing adjacent a cutwater within the casing. The impeller includes a hub having a pair of diametrically extending vanes with the outer end portion of each vane being angled in a trailing direction relative to the direction of rotation of the impeller. A semi-cylindrical projection having an axis parallel to the axis of the hub is formed on a trailing surface of each angled portion adjacent an outermost end thereof thereby reducing cavitation on the trailing surface of the impeller to reduce drag and turbulence while increasing pressure on the trailing surface. The surface of the semi-cylindrical projection is roughened to enhance hydraulic jump.