The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 1987
Filed:
Oct. 28, 1986
Robert S Krolick, San Rafael, CA (US);
James S Storey, South San Francisco, CA (US);
Robin E LeFever, Oakland, CA (US);
Wind Production Company, Millbrae, CA (US);
Abstract
A collapsible structure comprising a non-rigid helicoidal sheet braced by light-weight members according to one of several methods. The structure is used in the construction of a wind turbine, wherein a flexible fabric sheet (21) is reinforced by wires (42) sewn into its edges, and may be further reinforced by ribs or battens (30) sewn crosswise into the sheet. One end of the turbine is cnnected via a swivel (24) to a fixed mast (22) while the other end is conneced to the shaft (26) of an alternator. The electrical output of the alternator is connected through a rectifier/regulator (34) to a storage battery (38), thereby providing constant DC power. An alternative method of bracing employs ribs (30) along with counterhelical cables (64).