Patent ID: 6299406
Filing Date: 2001-10-09
Classification: F04D

Abstract:
A regenerative pump comprising:a housing with a pump inlet and a pump outlet; andan impeller rotatably mounted within said housing, said impeller having a central hub centered on a rotational axis of said impeller, said central hub having a plurality of vanes extending radially from said central hub, said plurality of vanes spaced uniformly around said central hub, wherein each of said plurality of vanes is coupled to an adjacent vane by a rib, and wherein each of said plurality of vanes has a vane groove having a first height and a length, a cover-side vane tooth extending from said vane groove having a second height, and a body-side vane tooth extending from said vane groove having a third height, wherein said cover-side vane tooth and said body-side vane tooth have a phase difference with respect to one another and wherein said vane groove runs substantially parallel to said rib.