Blade for windmill
US4171929A · kind A · utility
7Cited by
8References
12Claims
0Family size
Inventor
Key dates
| Filing date | Jun 27, 1977 |
| Grant date | Oct 23, 1979 |
| Priority date | — |
| Expiry date | Jun 27, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/72
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A blade for windmills fabricated of sheet metal to form a generally hollow structure containing a reinforcing member. The surfaces of the blade are such that the forward surface is flat and rear of the blade is formed by two surfaces which extend in opposite directions from a line extending from a radially inner point at a rearward side of the pitch axis of the blade to a point at the radial outer end and forward of the pitch axis of the blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.