Patent ID: 6974301
Filing Date: 2005-12-13
Classification: F04D,F05B

Abstract:
1. A self priming regenerative pump comprising: an impeller with a plurality of vanes formed on a periphery, of said impeller; a casing housing said impeller in a rotatable manner and is equipped with a suction port for sucking a fluid and a discharge port for discharging the fluid formed thereon; a pressurizing passage consisting of a gap between said casing and an outer periphery of said impeller; a suction flow passage extending from said suction port to said pressurizing passage to induce the fluid into said casing; a discharge flow passage extending from said pressurizing passage to the discharge port and further extending upwardly in a radical direction of said casing to discharge the fluid that has passed through the pressurizing passage in said casing, said discharge flow passage: a small diameter part formed at a position communicating with the pressurizing passage of said discharge flow passage, in particular, formed smaller than a diameter of said discharge port; and; a passage for communicating between said discharge port side of said smaller diameter part of said discharge flow passage and said pressurizing passage allow the fluid in said discharge flow passage to return to said pressurizing passage, wherein said position communicating with said pressurizing passage is outwardly offset from the center of the width of said impeller.