Patent ID: 6799941
Filing Date: 2004-10-05
Classification: F04D

Abstract:
A turbine fuel pump comprising:a housing having an inlet port, an outlet port, an impeller cavity and an arcuate channel extending circumferentially from the inlet port to the outlet port, the channel being in lateral communication with the impeller cavity; an impeller disposed in the impeller cavity and arranged and constructed to rotate within the housing, the impeller having a circumferential array of vanes projecting radially outward and defining an array of pockets communicating radially outward and with the channel; a guide ring engaged axially to the housing, the guide ring extending circumferentially around the impeller, the guide ring having a stripper segment and a trailing segment, the stripper and trailing segments extending circumferentially about the impeller, the stripper segment being disposed between the inlet and outlet ports, the trailing segment projecting from the stripper segment past the inlet port and toward the outlet port; a sleeve disposed radially outward from and directly facing the guide ring; and a protuberance constructed and arranged to be in contact between the guide ring and the sleeve, thereby biasing the stripper segment of the guide ring radially inward toward the array of vanes of the impeller.