Patent ID: 6890144
Filing Date: 2005-05-10
Classification: F02M,F04D,F05B

Abstract:
1. A regenerative fuel pump comprising: a housing; a pump cover mounted within said housing, said pump cover having a first side having a fuel inlet orifice and a second side defining a sealing surface and having a first flow channel formed therein, said fuel inlet orifice extending through said cover in fluid communication with said first flow channel; a pump body mounted within said housing adjacent said pump cover, said pump body having a first side having an outlet orifice and a second second flow channel formed therein whereby said first flow channel and said second flow channel define a pumping chamber, said outlet orifice extending through pump body in fluid communication with said second flow channel; an impeller mounted between said pump cover and said pump body within said pumping chamber, said impeller including a plurality of radially outwardly extending vanes spaced circumferentially about said impeller and defining a plurality of vane grooves, said vanes being spaced un-evenly in a non-repeating pattern about said impeller; said first flow channel having an inlet end and an outlet end and extending radially around said pump cover between said inlet end and said outlet end, said pump cover having a first stripper area defined as the area between said inlet end and said outlet end extending from said inlet end away from said first flow channel, said fuel inlet orifice being in fluid communication with said inlet end of said first flow chanel; said second flow channel having an inlet end and an outlet end and extending radially around said pump body between said inlet end and said outlet end, said pump body having a second stripper area defined as the area between said inlet end and said outlet end extending from said inlet end away from said second flow channel, said outlet orifice being in fluid communication with said outlet end of said second flow channel; at least one of said first and second stripper areas having a plurality of grooves formed therein and adapted to dampen pressure pulsations within said pumping chamber, said plurality of grooves comprising at least one radially extending groove formed therein, said radially extending groove not connecting to said first and second flow channels, and a groove tail extending from each of said inlet end and said outlet end of said first flow channel and a groove tail extending from each of said inlet end and said outlet end of said second flow channel.