A locking assembly includes a first motor gear configured to be rotated in a first direction. The locking assembly also includes a second motor gear configured to be rotated in a second direction. The locking assembly also includes a first lock gear configured to be rotated in the first direction in response to the first motor gear rotating in the first direction. The locking assembly also includes a second lock gear configured to be rotated in the second direction in response to the second motor gear rotating in the second direction. The locking assembly also includes a locking mechanism configured to be rotated in the first direction in response to the first lock gear rotating in the first direction, and to be rotated in the second direction in response to the second lock gear rotating in the second direction.

A piston lock system having first and second cylinders, first and second pistons telescopically connected to the cylinders, and first and second piston locks. The piston locks are movable in a transverse direction within a planar region between the cylinders, between unlocked positions in which the piston locks are not located between the free ends of the cylinders and the free ends of the piston, and locked positions in which the piston locks are located between the free cylinder ends and the free piston ends. A control link is operatively connected to the piston locks, and configured to simultaneously move the piston locks between the locked and unlocked positions.

Locking linear actuators, thrust reversers for aircraft that include the locking linear actuators, and methods of manufacturing the locking linear actuators. The disclosed locking linear actuators include an actuator housing that defines a bore housing an actuator piston and a lock sleeve. A portion of the actuator piston defines a lock aperture, housing a locking tab capable of radial movement. When the actuator is retracted, the locking tab engages with a step in the surface of the bore to lock the linear actuator, a distal portion of the lock sleeve extends into a portion of the actuator piston to prevent the locking tab from disengaging from the step in the surface of the bore.

A lock assembly includes a housing, a lock shaft, a reset shaft, and a transfer gear. The lock shaft is disposed partially within and extends from the housing and is movable between a lock position and an unlock position. The reset shaft is disposed at least partially within the housing, is spaced apart from the lock shaft, and is movable between a first position and a second position. The transfer gear is disposed between, and engages, the lock shaft and the reset shaft, and is configured to transfer motion between the lock shaft and the reset shaft. When the lock shaft moves from the lock position to the unlock position, the reset shaft is moved from the first position to the second position, and when the reset shaft moves from the second position to the first position, the lock shaft is moved from the unlock position to the lock position.

A variable length stay for an aircraft landing gear is disclosed having first and second sets of struts lying on different longitudinal axes that enable the stay to extend and contract by movement of the struts parallel to their axes. The stay may be locked in its extended and retracted configurations thus providing downlock and uplock functions for the landing gear. The struts of the stay may have an open and easy to inspect structure, have low friction kinematics, and do not need to telescope within each other or lie on a single common axis.

A hood lifting actuator according to various implementations includes a piston, a locking ring, and a housing including a protrusion. The housing further includes a distal end, the distal end defining a distal end wall, wherein the locking ring is retained between the distal end wall and the protrusion prior to actuation of the actuator. The piston travels from a retracted position to an extended position. In the extended position, the hood lifting actuator lifts a portion of a vehicle hood into an elevated position. In response to a force urging the piston from the extended position toward the retracted position, such as a person impacting the portion of the vehicle hood, the locking ring engages the protrusion and the piston, thereby locking the piston in a locked position.

An actuator assembly for moving an implement attached to an agricultural vehicle. The actuator assembly includes an actuator comprising a longitudinal axis, a cylinder extending along the longitudinal axis, and a piston rod extending from the cylinder along the longitudinal axis and that is configured to be attached to the implement at a connection point. A safety stop is pivotably attached at the connection point and is movable between a deployed position where the safety stop is configured to block retraction of the actuator, and a retracted position where the safety stop is not configured to block retraction of the actuator. The safety stop is configured to rotate with respect to the actuator about a first rotational axis that is orthogonal to the longitudinal axis, as well as a second rotational axis that is orthogonal to both the longitudinal axis and the first rotational axis.

A vehicle crane having a telescoping jib, comprising a basic box with retractable and extendible inner boxes and a securing and locking unit that comprises a first adjusting cylinder and a second adjusting cylinder which are each designed as unilaterally acting hydraulic cylinders with a first spring element and a second spring element as well as a first line and a second line, where the first adjusting cylinder moves locking bolts between operating states of unbolted and bolted and the second adjusting cylinder moves driving bolts between operating states of secured and released. In the event of a malfunction, the first adjusting cylinder moves to the bolted operating state and the second adjusting cylinder moves to the released operating state.

A hydraulic actuator can be provided for actuating a functional part by a movement of a force transmission element, with a working piston which can be acted upon by a hydraulic pressure of a pressure supply and is movable thereover between a first extreme position and a second extreme position in a piston/cylinder unit, wherein two chambers separated from one another by the working piston are present and a first chamber is formed as a first working chamber with a pressure inlet and a hydraulic pressure applied to the first pressure inlet urges the working piston in the direction of the first extreme position in order to enlarge the first working chamber. At least one retaining means is provided which is capable of automatically locking the working piston in one of the extreme positions when this extreme position is reached, even without any hydraulic pressure being applied.

A pneumatic actuator for imparting velocity to a resting object, comprising a fixed member and a ram, the ram having two or more generally elongated ram members,

wherein the fixed member is formed with a base plate having an inlet hole therethrough,

the ram members are formed and disposed concentrically about the center axis so as to lie one within another and to move in a telescopic arrangement,

the innermost one of the ram members is configured to enable it to be driven by any pressurized gas fed through the inlet hole and to drive the object, and each of the other ram members is configured to move only behind the innermost ram member;

the actuator being operative to move the innermost ram member along its entire range of motion and thereby impart velocity to the object.