System for fastening a hollow extruded blade for an axial-flow f

Details System for fastening a hollow extruded blade for an axial-flow f System for fastening a hollow extruded blade for an axial-flow f

1994-01-04

1995-03-28

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Formed with main spar

416223, 2988921, 298893, 2988961, 2988972, B64C 1124

Patent

active

054011388

ABSTRACT:
A hollow extruded axial flow fan blade which includes two internal longitudinal reinforcing elements (ribs) perpendicular to the blade profile and in which are inserted through bolts for fastening the blade to a round supporting bar inserted longitudinally in the blade. The fastening bolts are completely internal to said blade being parallel to the plane of revolution of the blade while passing diametrally and perpendicularly through the round supporting bar.

REFERENCES:
patent: 1969781 (1934-08-01), De La Cierva
patent: 2067228 (1937-01-01), Bennett
patent: 2070657 (1937-02-01), Hafner
patent: 2183158 (1939-12-01), Bennett
patent: 2207948 (1940-07-01), Sheridan
patent: 2412908 (1946-12-01), Platt et al.
patent: 3551070 (1970-12-01), Glucksman
patent: 4662819 (1987-05-01), Lakowske et al.
patent: 4971521 (1990-11-01), Atarashi et al.

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