Title of Invention

AN IMPROVED CENTRIFUGAL PUMP FOR A CLOSE CIRCUIT PLANT.

Abstract

I claim 1. An improved centrifugal pump -for a close circuit plant comprising of a pump casing having an inlet flange and an outlet -flange, a main impeller mounted inside the casing, on a pump shaft, the said main impeller consisting of a -front plate, a back plate, an inlet and an ou.tlet defining primary vanesf the back plate being provided with an extension to enlarge its diameter and back vanes being provided on the back side o-f the back plate extending radially from the central hub to the outer periphery of the enlarged back plate, an auxiliary impeller being mounted on the pump shaft behind the said main impeller„ an auxiliary impeller cover being provided between the said main impeller and the auxiliary impel ler 9 the said cover being -fixed in the pump casing remaining stationary;; the said auxiliary impeller consisting o-f a plate havipg plain . surface at the front face and provided with auxiliary \ back vanes on the back side, the said plate having a stepped hub at the front side and a sleeve on the back side, the said plate being larger in diameter than the diameter of back plate o-f the main impeller, the auxiliary back vanes being extended radially from the said sleeve to the outer periphery of the said plate, the said sleeve being extended through a stuffing box fixed on the back side o-f the said casing.

Full Text

Documents:

205-BOM-1991-CANCELLED PAGES.pdf

205-BOM-1991-CORRESPONDENCE(IPO).pdf

205-BOM-1991-CORRESPONDENCE(RECEIVED).pdf

205-BOM-1991-FORM 2(COMPLETE).pdf

205-BOM-1991-FORM 2(GRANTED).pdf

205-BOM-1991-FORM 2(TITLE PAGE)-(AMENDED).pdf

205-BOM-1991-FORMS.pdf