Collapsible vertical wind mill

Details Collapsible vertical wind mill Collapsible vertical wind mill

1985-03-25

1986-11-25

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Radially extensible or retractible rotor working member

416132B, 416142, F03D 306

Patent

active

046246240

ABSTRACT:
A collapsible vertical wind mill is disclosed, which comprises four main wings arranged in a rhombic form having a pair of opposed corners fitted on a shaft and auxiliary wings each provided on each of the main wings. The upper one of the pair corners on the shaft is fitted via a bearing capable of movement along the shaft. The other pair of opposed corners of the rhombic structure each have a hinged structure capable of variation of the angle.

REFERENCES:
patent: 1319174 (1919-10-01), Ochoa
patent: 3918839 (1975-11-01), Blackwell et al.
patent: 4082479 (1978-04-01), Rangi et al.
patent: 4084102 (1978-04-01), Fry et al.
patent: 4115032 (1978-09-01), Lange
patent: 4142822 (1979-03-01), Herbert et al.
patent: 4329116 (1982-05-01), Ljungstrom
patent: 4422825 (1983-12-01), Boswell
patent: 4470563 (1984-09-01), Engelsman

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