Vacuum blade for a hollow type fan and process

Details Vacuum blade for a hollow type fan and process Vacuum blade for a hollow type fan and process

1985-02-27

1987-09-08

Garrett, Robert E.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Hollow

416 84, 415119, F04D 2938

Patent

active

046921001

ABSTRACT:
The interior of a hollow propeller blade is placed under vacuum for enhancing rigidity of the blade and reducing noise production during its rotation.

REFERENCES:
patent: 2405022 (1946-07-01), Enos
patent: 2652121 (1953-09-01), Kearns, Jr. et al.
patent: 3667862 (1972-06-01), Parr

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