Axial flow impeller

Details Axial flow impeller Axial flow impeller

1989-09-18

1991-02-26

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Tined or irregular periphery

416234, 416238, 415119, B63H 700, F01D 500

Patent

active

049957872

ABSTRACT:
An axial flow air impeller for automotive radiator fan use and the like comprising a hub carrying a plurality of integrally formed similar circumaxially spaced and generally radially outwardly projecting air moving blades. Each blade has a root end portion integral with the hub and a radially outwardly disposed tip end portion with smoothly curving leading and trailing edges extending therebetween. The leading edge curves substantially forwardly while the trailing edge extends substantially radially to provide for a blade projected width at the tip end portion approximately 40% greater than at the root end portion. The thickness of each blade varies from a maximum at the root end portion to a minimum at the tip end portion with the latter being at least three times the thickness at the blade edge. An integral orifice ring circumscribes the plurality of blades and has a bell mouth at its upstream or downstream end.

REFERENCES:
patent: 3449605 (1969-06-01), Wilson
patent: 4358245 (1982-11-01), Gray
patent: 4569631 (1986-02-01), Gray, III
patent: 4684324 (1987-08-01), Perosino
patent: 4840541 (1989-06-01), Sakane et al.

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