Abstract: Thrust reverser actuation mechanisms comprising a pair of nested screwjacks commonly driven by a screwjack drive motor. The inner screwjack translates the blocker doors aft and the outer screwjack deploys the blocker doors into the engine jet stream. The screwjacks have different thread pitches so that the blocker doors are translated aft at a faster rate of speed than they are deployed into the engine jet stream.

Abstract: A thrust reverser for the gas stream of a turbofan jet aircraft engine. The engine having a surrounding cowl section which forms a duct therebetween for engine gases. The surrounding cowl is divided into two sections, a forward fixed in position section and an aft translatable section. The thrust reverser operating mechanism comprises a plurality of reverser or blocker doors rotatable in and out of the duct. The operation mechanism of each of the reverser blocker doors comprises a pinion gear rotatable about a central axis which engages a pair of opposing gear racks, one gear rack attached to the forward fixed in position cowl section and the other attached and translated with the aft translated cowl section and link members interconnecting the pinion gear, where they have an off center pivotal attachment, and the reverser or blocker doors where they have a like pivotal attachment.

Abstract: A thrust reverser arrangement for a fan-type jet propulsion engine comprising a split cowling surrounding the engine and forming a bypass duct with the engine outer wall. The rear portion of the split cowling is translatable rearward for forming a space between the cowling portions. A translatable sleeve having cascades through portions of its walls is interconnected with the rear portion of the cowling and translates therewith and fills the space between the cowling portions. Blocker doors are interconnected to the rear portion and are rotated into the bypass duct during the terminal rearward movement of the rear portion.