Abstract: A double acting mechanical shock isolator that includes a stack of friction springs contained within a housing. The stack is retained between the end walls of the housing by a pair of opposed slides. A sleeve passes through the stack and the ends of the sleeve are contained within opposing slides. The ends of the sleeve are connected to the slides by lost motion devices so that the sleeve is engaged by one of the containing slides when the sleeve moves toward the opposing slide and releases the slide when the sleeve moves in the opposite direction so that the stack is loaded in compression when the sleeve is moved axially in either direction.

Abstract: A control apparatus associated with a hydraulic lock that contains a piston rod and an operating pin slidably contained within piston rod. A conduit contains a proximal end connected to a push button unit and a distal end connected to a lever arm assembly. The lever arm assembly contains a platform secured to the terminal end of the piston rod and a lever arm rotatably mounted over the operating pin. A cable extends through the conduit between a rocker arm in the push button unit and the lever arm so that when the button is depressed, the operating pin is moved from an inoperative position to an operative position. A locking plate is pivotally mounted upon the distal end of the conduit and arranged to move over the top surface of the platform into locking engagement with the piston rod. A cutout is formed in the plate which engages a groove formed in the terminal end of the piston rod to lock the lever arm assembly to the rod with the lever arm in position to engage the operating shaft.

Abstract: A double acting shock isolator that includes a cylindrical housing having a radially expanded chamber therein. The housing is closed at one end and open at the other end and a connector is mounted at the closed end. A stack of friction rings are mounted in a preloaded condition between the ends of the expanded chamber and a rod passes into the open end of the housing and through the stack. A pair of spaced apart raised flanges are mounted upon the rod that engages either end of the stack. A second connector is mounted upon the distal end of the rod outside of the housing so that the stack of friction rings is further compressed uniformly when either a tensile force or a compressive force is applied to the connectors.