Die castable centrifugal fan

摘要

Disclosed herein is a fan assembly comprising a first fan member including a plurality of angularly space vane portions extending perpendicularly of the axis of intended fan rotation and perpendicularly to a plane perpendicular to the axis of intended fan rotation and having axially outer edges, a second fan member including a second plurality of vane portions corresponding in number and angular spacing to the vane portions of the first member, each of the second member vane portions having an axially inner edge and an axially outer part extending arcuately in a plane extending parallel to the intended axis of fan rotation and perpendicularly to a plane extending radially from and containing the intended axis of fan rotation, and separable interfitting means on the first and second fan members for aligning the outer edges of the vane portions of the first fan member with the inner edges of the vane portions of the second fan member and for rotatably driving one of the first and second fan members in response to rotation of the other of the first and second fan members.