General Electric Company

Michael Even-Nur

James C Przytulski

William Terence Dingwell

Wayne Ray Bowen

Frederic Gardner Haaser

Ramon Themudo

Robert H Kraimer

Carl J Hoffmann, Jr

Samir I Shah

A torque shaft assembly includes a hollow tube with a central axis disposed between and fixedly connected to first and second crankshafts at first and second distal ends, respectively, of the tube for movement of an array of connecting members such as push rods. A hollow interior of tube between the first and second crankshafts is filled with a sufficient quantity of flowable inertia material or damping media to absorb vibratory energy by friction during operation of the engine. The hollow interior is preferably filled with a quantity of damping media to a level by volume of about 98% and a preferred flowable inertia material is round steel shot. A plurality of spaced-apart clevises are fixedly attached to a tube wall on an outer surface of the tube wall surrounding the hollow interior. Each clevis includes connection means disposed away from the wall outer surface for connection with an actuator for movement of the array of adjustable devices such as variable stator vanes.

Damped torque shaft assembly

A bypass valve assembly includes an outer casing and a spaced outer liner defining an annular bypass channel for channeling bypass air. The outer liner includes a plurality of circumferentially spaced slots around which are positioned an annular valve body. The valve body is positionable from a closed position substantially blocking bypass airflow into the slots to an open position uncovering the slots. Positioning means rotates and translates the valve body over the outer liner for covering and uncovering the slots.

Variable area bypass valve assembly

Disclosed is apparatus to prevent vibration of a pinned root fan blade during low speed revolution of the blade comprising a damping device which extends between the airfoil of the blade and the engine structure.

Aircraft fan blade damping apparatus

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Cincinnati, OH, United States of America

Michael Even-Nur