Patent ID: 6074166
Filing Date: 2000-06-13
Classification: F04D,F05C,F05D

Abstract:
A pump comprising:a housing formed by first and second members coupled together such that said first and second members extends along a central axis,said first member having a wall defining a front inlet leading to a first cavity in line with said central axis and an outlet extending through said wall of said first member from said first cavity transverse to said central axis,said second member having a wall with front and rear ends defining a second cavity extending between said front and rear ends in line with said central axis,a shaft rotatably supported in said second cavity of said second member and having an axis in line with said central axis with a front end extending into said first cavity,an impeller coupled to said front end of said shaft for rotation with said shaft in said first cavity,said impeller having an axis in line with said central axis,said impeller having a front side facing said inlet with a plurality of vanes angularly spaced apart about its said axis curving outward from an inner portion in a given direction as seen from said inlet of said pump,said impeller having a rear side opposite said front side with a plurality of vanes angularly spaced apart about its said axis curving outward from an inner portion in said given direction as seen from said inlet of said pump,a baffle fixedly secured to said housing rearwardly of said impeller,said baffle having a central aperture through which said shaft extends with said central aperture having a size sufficient to allow said shaft to rotate freely relative to said baffle,said baffle having a front side facing said impeller and a rear side opposite its said front side,said rear side of said baffle having a plurality of vanes angularly spaced apart about said central aperture and curving outward in said given direction as seen from said inlet of said pump, andmeans for rotating said shaft in a direction opposite said given direction as seen from said inlet of said pump.