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:
Jul. 16, 1991
Filed:
Nov. 20, 1989
Ernst C Schellhase, Fort Worth, TX (US);
Dan Anastas, deceased, late of Swarthmore, PA (US);
by Peggy Anastas, executrix, Delaware County, PA (US);
Paul E Keefer, Bedford, TX (US);
Cecil E Covington, Hurst, TX (US);
Joseph J Zierer, Fort Worth, TX (US);
William D Neathery, Fort Worth, TX (US);
Bell Helicopter Textron, Inc., Forth Worth, TX (US);
Abstract
Folding and folding locking apparatus for rotor blades that includes a power actuator for rotating the blades and locking means for securing the blade in the deployed position and securing the blades against rotation of the pitch angle during and when the blades are folded. The apparatus also provides for the complete fairing of the blades at their connections with the rotary drive hub and provides a powered door in the fairing that can be opened and closed to permit the quick and easy folding and redeployment of the blades.