Axial fan

Details Axial fan Axial fan

1989-01-31

1990-06-19

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Adjustable

416135, F04D 2936

Patent

active

049349040

ABSTRACT:
An axial fan construction wherein individual blade assemblies are secured within apertures in the fan hub. Fasteners extend between a retaining member and a blade base, with each blade base including a shoulder overlying a bearing surface on the hub and with resilient members positioned between the blade base shoulders and hub bearing surfaces. A spacer maintains the blade base shoulders and retaining members a preselected distance apart to allow prestressing of the fasteners while limiting the compressive force applied to the resilient member. The blade base shoulders and hub bearing surfaces are configured to cooperate with the resilient member to impart a centering force on the blade base relative to a hub aperture when the resilient member is compressed between the blade shoulder and hub bearing surface.

REFERENCES:
patent: 2307490 (1943-01-01), Curley
patent: 2936155 (1960-05-01), Howell et al.
patent: 3323710 (1967-06-01), Daly
patent: 3357496 (1967-12-01), Petersen
patent: 3428244 (1969-02-01), Palmer
patent: 3545884 (1970-12-01), Schroeter et al.
patent: 3561883 (1971-02-01), Berry
patent: 3799699 (1974-03-01), Master et al.
patent: 4012171 (1977-03-01), Suvak

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