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US 2013/0009004 A1 Jan. 10,2013 propulsion system 12A (shown inFIG. 2).Inaddition, due to the features ofthe interfacebetWeen duct 28 and box 36 (such as transition feature 62, kicker seal 64, and box ramp 39), exhaustgasG isredirectedWithoutunnecessaryimpedances. [0045] DepictedinFIG.3Bisoneembodimentofthe oppositesideofbox36(notshoWn)suchthatthetWoactua present invention, to Which there are alternative embodi ments. For example, blocker portion 46 can have a seal to decrease leakage around kicker blocker 34 When thrust reverser14A isdeployed. [0046] InFIG.4A,asidevieWofalternateembodiment actuator60'having locklever74 isshoWn. ShoWn inFIG. 4A are propulsion system duct 28, box 36, lateral box side 38, hinge 42', brackets 68A-68B, hinge shaft 70, lever arm 72, locklever74,lockspring76,andunlockcam78. [0047] Intheillustratedembodiment,alternateembodi menthinge42hasrotatablehingeshaft70.Alternateembodi ment actuator60'isrotatablyconnectedtobracket69A Which is connected to hinge 42'. Actuator 60' is a linear actuator of the double-acting pneumatic cylinder type that is located outside of box 36, adjacent to lateral box side 38. Actuator 60' isalso rotatably attached to unlock cam 78. Unlock cam 78 is also rotatably attached to lever arm 72. Lever arm 72 has a square aperture that interfaces With a square feature on the endofhingeshaft70,Whichattachesleverarm72tohinge42. Kicker blocker 34 (shoWn in FIG. 1B) is also attached to hingeshaft70suchthatleverarm72andkickerblocker34 rotatetogether. tors 60' Work together to deploy thrust reverser 14A. In such an embodiment, there may be a locking mechanism on one side(asshoWn)orbothsides. [0053] InFIG.4B,asidevieWofrotaryactuator88having Worm gear 86 is shoWn. ShoWn in FIG. 4B are propulsion systemduct28,box36,lateralboxside38,hinge42',bracket 68',hingeshaft70,pinionarm82,pinionteeth84,Worm gear 86, and rotary actuator 88. [0054] Intheillustratedembodiment,alternateembodi menthinge42hasrotatablehingeshaft70.Rotaryactuator88 is connected to bracket 68' Which is connected to hinge 42'. Rotary actuator 88 is a pneumatic rotary motor that is located outsideofbox36,adjacenttolateralboxside38.Worm gear 86isattachedtorotaryactuator88,andWorm gearinterfaces With pinion teeth 84 of pinion arm 82. Pinion arm 82 has a square aperture that interfaces With a square feature on the end of hinge shaft 70, Which attaches pinion arm 82 to hinge 42. Kicker blocker 34 (shoWn in FIG. 1B) is also attached to hinge shaft 70 such that pinion arm 82 and kicker blocker 34 rotatetogether. [0055] Intheillustratedembodiment,thrustreverser14A (shoWninFIG.3A)isinthestoWedposition.Todeploythrust [0048] Locklever74isrotatablyconnectedtobracket69B reverser14A,rotaryactuator88rotatesWormgear86ina?rst Which is connected to hinge 42'. Lock spring 76 is connected tobracket69B atoneendandtolocklever74attheotherend. Lock spring 76 exerts force that pulls lock lever toWards the free end of lever arm 72. direction.As Worm gear86turns,Worm gear86exertsforce onpinionteeth84Whichrotatespinionarm82andhingeshaft 70 in a second direction that is perpendicular to the ?rst direction. This deploys thrust reverser 14A. The angle of rotation that pinion arm 82 travels through to get to the fully [0049] Intheillustratedembodiment,thrustreverser14A (shoWninFIG.3A)isinthestoWedposition.Todeploythrust deployedpositionisthesameasangle61(shoWninFIG.3B) reverser14A, actuator60'pullsonunlockcam 78.As aresult, unlock cam 78 rotates toWards lock lever 74, Which forces lock lever 74 aWay from the free end of lever arm 72. Once lock lever74 has moved a suf?cient amount, lock lever74 Will be unlocked and Will no longer be preventing lever arm 72 from rotating. Then lever arm 72 Will be rotated by actuator 60', Which also rotates hinge shaft 70, deploying thrust reverser 14A. The angle of rotation that lever arm 72 travels through to get to the fully deployed position is the same as angle 61 (shoWn in FIG. 3B) because there is no gearing betWeen lever arm 72, hinge shaft 70, and kicker blocker 34 (shoWninFIG.1B). because there is no gearing betWeen pinion arm 82, hinge shaft70,andkickerblocker34 (shoWninFIG. 1B). [0056] TostoWthrustreverser14A,rotaryactuator88 rotatesWorm gear86inaseconddirectionthatisoppositeto the?rstdirection.BecauseWorm gear86meshesWithpinion teeth 84, pinion teeth 84 cannot slide past Worm gear 86. Thereby, Worm gear 86 controls the rotational position of pinion arm 82 at all times. [0057] Thecomponentsandcon?gurationofrotaryactua tor88asshoWninFIG.4B alloWforthrustreverser14Atobe moved betWeen the stoWed position and the deployed posi tion.Inaddition,Worm gear86preventsthrustreverser14A [0050] Toreturnthrustreverser14AtothestoWedposition, frominadvertentlymovingregardlessofthepositionthrust actuator 60' pushes on lever arm 72. Once lever arm 72 has rotated a suf?cient amount, the free end of lever arm 72 Will slide past lock lever 74 as lock lever 74 is pushed outWard from lever arm 72. Once the free end of lever arm 72 has rotated a suf?cient amount, lock lever 74 Will snap back toWard lever arm 72. This captures and locks lever arm 72 such that it cannot rotate in the deploy direction Without the assistance of actuator 60' and unlock cam 78. [0051] The components and con?guration of alternate embodiment actuator 60' and lock 68 as shoWn in FIG. 4A alloW forthrustreverser14A tobe moved betWeen the stoWed position and the deployed position. In addition, thrust reverser 14A is automatically locked When in the stoWed position such that thrust reverser 14A cannot inadvertently move to the deployed position. [0052] Depicted in FIG. 4A is one embodiment of the present invention, to Which there are alternative embodi reverser 14A isin. [0058] DepictedinFIG.4Bisoneembodimentofthe present invention, to Which there are alternative embodi ments. For example, rotary actuator 88 can be a different type of rotary actuator, such as a hydraulic actuator or an electric motor. For another example, there can be another rotary actuator 88 on the opposite side of box 36 (not shoWn) such thatthetWorotaryactuators88Worktogethertodeploythrust reverser 14A. [0059] ItshouldberecogniZedthatthepresentinvention provides numerous bene?ts and advantages. For example, aircraft 10 can sloW itselfduring landing and can taxi back Wards under itsoWn poWer. Furthermore, these capabilities existWithoutsacri?cingthestealthpropertiesofaircraft10. For another example, kicker blocker 10 is a single compo nent. For a further example, thrust reversers 14A-14D redi rectexhaustgasG Withminimalimpedanceandleakage.For ments. For example, actuator 60' can be another type oflinear actuator, such as an oil hydraulic cylinder, a fuel hydraulic cylinder, an electro-mechanical actuator, or a cable actuator. Foranotherexample,therecanbeanotheractuator60'onthePDF Image | INTERNAL GAS TURBINE PROPULSION THRUST REVERSER
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