Patent
Frangible construction and actuator utilizing same
TLDR
An actuator system for use in an aircraft comprising first and second actuators is described in this article, where a connecting rod is joined to the piston and projects through an aperture in a transverse member of the housing.Abstract:
An actuator system for use in an aircraft comprising first and second actuators. The first actuator includes a housing having a chamber and a piston movable in the chamber. A connecting rod is joined to the piston and projects through an aperture in a transverse member of the housing. The connecting rod of the first actuator and the second actuator are drivingly interrelated to an output member so that either the piston or the second actuator can move the output member. Peripheral regions of the piston and the transverse member are frangible.read more
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Patent
Actuator for aircraft stabilizers with a failure responsive lock control mechanism
Milad A. Shaheen,Robert V Dreher +1 more
TL;DR: In this paper, a horizontal stabilizer actuator for a winged aircraft which is selectively pivotally controlled by a pilot or operator at a remote location in the aircraft and which has a primary load path responsive to the selective control by the pilot for setting the pivoted position of the stabilizer is presented.
Patent
Jam proof piston
TL;DR: An improved jam-proof control including a cylinder-piston assembly in which the piston is controllably positioned within the cylinder to perform the control function was proposed in this article, where the piston rod which extends through the cylinder wall is enveloped by a deformable sleeve.
Patent
Ballistic tolerant hydraulic control actuator and method of fabricating same
TL;DR: In this article, a ballistic tolerant control actuator of the hydraulic cylinder-piston type and having a hybrid housing comprising a structural outer wall of selected characteristics and wall thickness is presented.
Patent
Jam resistant fluid power actuator for ballistic-damage tolerant redundant cylinder assemblies
TL;DR: In this article, a hydraulic actuator having redundant cylinder assemblies, each assembly having a relatively thin tubular wall reinforced to withstand hydraulic pressure by a layer of resin reinforced filament, the thickness and the material of the wall being such that petals formed from the wall by projectile penetration are sheared by engagement with a piston of the assembly as this piston is moved, together with an actuated element, by the piston of another assembly.
Patent
Ballistically tolerant control system
TL;DR: An improved jam-proof control including a cylinder-piston assembly in which the piston is controllably positioned within the cylinder to perform the control function and the cylinder snugly envelopes a deformable sleeve.
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Patent
Position control servo systems
TL;DR: In this paper, a position control servo system comprising a hydraulic actuator controlled by a fluid control valve which is responsive to output signals applied to it from a pair of transducers, each of which is each responsive to an input signal applied thereto to produce an actuator output which a function of the input signals, which are in normal operation substantially equal, and control means responsive to a difference between the transducer output signals up to a predetermined and allowable difference to adjust on or the other or both of the transducers and/or input signals thereto, thereby to maintain the trand
Patent
Piston assembly for pumps, motors and the like
TL;DR: In this article, a dry-running piston assembly is described, in which the piston is slidable with slight clearance in a cylinder and is formed with at least one groove confronting the wall of the cylinder and receiving a wear-type (e.g., self-lubricating) piston ring.
Patent
Parallel redundant hydraulic actuator
TL;DR: In this article, a parallel redundant hydraulic actuator comprises a plurality of systems each of which includes a fixed primary cylinder such as 12, Fig. 4 (not shown) the primary pistons (16-19) have passages (96-99) and (100-103) whereby movement of the primary and secondary pistons extend either side of the pistons to equalize the pressure areas.