Patent ID: 7387493
Filing Date: 2008-06-17
Classification: B23K,Y10T

Abstract:
1. A rotary impeller assembly for a fluid machine, the impeller assembly comprising: a support member having an outer surface; and at least one blade including first and second integral portions and two opposite side walls, the blade being connected to the support member by at least one weld made between one side wall and the support member outer surface so as to form a weld joint, the blade first portion having a first thickness between the two side walls and being spaced from the support member surface, the blade second portion having an edge extending between the two side walls, the edge being disposed against the support member outer surface, the second portion having a second thickness between the two side walls, the second thickness being greater than the first thickness such that the weld joint has extra material for stress reduction and the thickness of the blade first portion allows flexure away from the weld joint, the blade second portion having a height extending between the blade first portion and the edge, the height being greater than the second thickness.