Patent ID: 6984099
Filing Date: 2006-01-10
Classification: F02M,F04D

Abstract:
1. An impeller comprising: a central hub; a first plurality of vanes extending radially from the central hub in a first row; a second plurality of vanes extending radially from the central hub in a second row positioned adjacent to and staggered from the first row, each of the vanes from the first row being paired with a vane from the second row to form a plurality of vane pairs, with each of the vane pairs having a first row vane and a second row vane; and a plurality of partition walls, each partition wall being positioned between each first and second row vane within the pair of vanes, and having a forward edge and a rear edge, wherein each partition wall has a first reduced material area on the forward edge thereof where the first row vane meets the partition wall and a second reduced material area on the rear edge thereof where the second row vane meets the partition wall.