Propellers and windmills

Details Propellers and windmills Propellers and windmills

1980-06-03

1983-04-12

Hunt, Brooks H.

Stock material or miscellaneous articles

All metal or with adjacent metals

Workpiece mimicking finished stock having nonrectangular or...

46 53, 46 57, 416223R, 416DIG3, D12214, 46 82, B64C 1120

Patent

active

043798136

ABSTRACT:
The present invention provides a propeller or windmill blank comprising a planar sheet of material having markings defining, or being shaped to have, a central or hub region and two blades extending in opposite directions along imaginary lines; and wherein the blank has a marking or line of preferential folding inclined to the first mentioned lines which, when the blank is bent therealong, will result in pitch being applied to the blades.

REFERENCES:
patent: 1851806 (1932-03-01), Brown
patent: 2972481 (1961-02-01), Shapiro
patent: 2996120 (1961-08-01), McGregor
patent: 3252241 (1966-05-01), Gould
patent: 4060338 (1977-11-01), Macauley

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