An actuation device for a human-powered vehicle comprises a base member, a movable member, and an actuator. The movable member is movably provided on the base member. The actuator is configured to be actuated by stimulation including at least one of electric stimulation and heat stimulation so as to move the movable member relative to the base member in a first direction by pulling the movable member.

An aircraft store ejector systems and subsystems thereof. Embodiments can include a two-reservoir re-pressurization system wherein a remote reservoir is used to maintain desired pressure in a local ejector reservoir. The system can include a release valve having a vent valve and valve piston. The release valve can control release of pressurized gas to a pitch control valve. The pitch control valve can be configured to distribute the pressurized gas between two or more ejector piston assemblies. One or more of the ejector piston assemblies can include multiple concentric piston stages and piston chambers, the piston chambers configured to contain a volume of gas. The ejector piston assemblies can be configured to compress the volume of gas within the piston chambers as the piston stages are extended out from the aircraft. Such compression can provide a return force to the piston stages.

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 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 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.

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.

The present invention discloses a pneumatic-controlled pitch-adjustable telescopic mechanism used for a robotic arm, which belongs to the technical field of robotic arm pneumatic control movement, comprising a sliding block, a fixed block and a driving device, the fixed block is in a fixed position; the sliding block slides relative to the fixed block according to a predetermined movement track, which is used to adjust the distance between the sliding block and the fixed block; the driving device is used to provide power to drive; a sliding bar is disposed between the driving device and the sliding block, one end of the sliding bar is fixedly connected to the driving device, and the other end is slidingly connected to the sliding block, which is used to drive the sliding block to slide; the fixed block is provided with a fixed base and a guide mechanism, the fixed base is used to restrict the sliding bar from moving in a direction non-parallel to the predetermined movement track; the guide mechanism is used to guide the sliding block to slide along the predetermined movement track. The present invention provides a pneumatic-controlled telescopic mechanism that can adjust the length of a robotic arm joint and has a small and flexible joint; using a gas bag as a driving force, the present invention has high movement precision, and is environmentally friendly and pollution-free, and the length of the joint can be changed, increasing the flexibility of the robotic arm.

The present invention discloses a pneumatic-controlled pitch-adjustable telescopic mechanism used for a robotic arm, which belongs to the technical field of robotic arm pneumatic control movement, comprising a sliding block, a fixed block and a driving device, the fixed block is in a fixed position; the sliding block slides relative to the fixed block according to a predetermined movement track, which is used to adjust the distance between the sliding block and the fixed block; the driving device is used to provide power to drive; a sliding bar is disposed between the driving device and the sliding block, one end of the sliding bar is fixedly connected to the driving device, and the other end is slidingly connected to the sliding block, which is used to drive the sliding block to slide; the fixed block is provided with a fixed base and a guide mechanism, the fixed base is used to restrict the sliding bar from moving in a direction non-parallel to the predetermined movement track; the guide mechanism is used to guide the sliding block to slide along the predetermined movement track. The present invention provides a pneumatic-controlled telescopic mechanism that can adjust the length of a robotic arm joint and has a small and flexible joint; using a gas bag as a driving force, the present invention has high movement precision, and is environmentally friendly and pollution-free, and the length of the joint can be changed, increasing the flexibility of the robotic arm.

A crane telescope locking device includes a control device which is hydraulically in contact with a telescoping cylinder of a crane telescope and, for the purpose of actuating, with at least one cylinder lock hydraulic cylinder and includes a valve which is open in its inactivated resting state and thus opens a fluidic connection between the telescoping cylinder and the at least one cylinder lock hydraulic cylinder. A telescoping cylinder (6) of a crane includes such a crane telescope locking device.

A crane telescope locking device includes a control device which is hydraulically in contact with a telescoping cylinder of a crane telescope and, for the purpose of actuating, with at least one cylinder lock hydraulic cylinder and includes a valve which is open in its inactivated resting state and thus opens a fluidic connection between the telescoping cylinder and the at least one cylinder lock hydraulic cylinder. A telescoping cylinder (6) of a crane includes such a crane telescope locking device.