Vertical-axis windmill of the Chinese type

Details Vertical-axis windmill of the Chinese type Vertical-axis windmill of the Chinese type

1979-12-07

1982-12-21

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Working member foldable, pivotable or collapsible to non-use...

416119, 416DIG6, F03D 1104

Patent

active

043647103

ABSTRACT:
A vertical-axis windmill comprising a central pole having a longitudinal axis about which a plurality of sales may revolve as would the main sails of three sailing boats restricted to follow a horizontal circular course and including means for lowering the windmill for protection or service without the sails engaging the ground.

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