Patent Number: 6,966,865

Title: High ratio, reduced size epicyclic gear transmission for rotary wing aircraft with improved safety and noise reduction

Abstract: A high ratio, double helical epicyclic gear transmission that is primarily intended for use in rotary wing aircraft employs double helical planet gears to obtain a reduction in size of the transmission, to improve the safety of the transmission, and to reduce the noise created by operation of the transmission.

Inventors: Drago; Raymond J. (Glen Mills, PA), Lenski Jr.; Joseph W. (Newtown Square, PA), Robuck; Mark J. (Chadds Ford, PA)

Assignee: The Boeing Company

International Classification: B64C 27/00 (20060101); B64C 27/12 (20060101); F16H 1/46 (20060101); F16H 1/28 (20060101); F16H 57/00 (20060101); F16H 57/08 (20060101); F16H 001/36 ()

Expiration Date: 1/22/02018