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:
Apr. 17, 1979
Filed:
Jun. 02, 1977
Karl H Bergey, Jr, Norman, OK (US);
Other;
Abstract
An improved fluid driven turbine blade system is provided, which is self-governing at relatively high fluid velocities. This is achieved by a combination of two sets of turbine blades, one having a positive efficiency, and the other having a negative efficiency at the fluid velocity at which the self-governing effect occurs. Also provided is a variable friction drive apparatus for powering an energy conversion device. The combination of the improved turbine blade system and the variable friction drive comprises a windmill for driving an electric generator, the windmill having a low required start-up torque at low wind speeds and being self-governing so as not to overspeed the generator at high speeds.