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:
Aug. 03, 2004
Filed:
May. 17, 2002
Michael S. Torok, Cheshire, CT (US);
Robert C. Moffitt, Seymour, CT (US);
Peter F. Lorber, Coventry, CT (US);
Geoffrey C. R. Davis, Madison, CT (US);
Andreas P. F. Bernhard, Shelton, CT (US);
William Arthur Welsh, New Haven, CT (US);
Brian E. Wake, South Glastonbury, CT (US);
Sikorsky Aircraft Corporation, Stratford, CT (US);
Abstract
A multi-element rotor blade includes a main element and an active slat movable relative to the main element. The slat rotates and translates relative to the main element from a base position. The base position provides a compromise between minimum coefficient of drag C and maximum coefficient of lift C . In the advancing blade, since the airspeed thereof is significantly greater than the retreating blade, the slat is positively rotated from the base position to minimizes drag at low angles of attack. In the retreating blade, since the airspeed thereof is significantly lower than the advancing blade, the slat is negatively rotated and translated to maximize the coefficient of lift C .