Abstract: A radial stacked actuator includes an actuator ground; a motor including a motor ground constrained to the actuator ground with one or more rotational degrees of freedom; a spring coupled between the motor ground and the actuator ground; a gearbox coupled to the motor at an input of the gearbox; and an actuator output coupled to an output of the gearbox. The spring is configured to deflect as the motor ground rotates relative to the actuator ground.

Abstract: A robotic manipulator comprises a plurality of spring compensated joints, each including a four-bar linkage mechanism, a gravity compensating spring, a spring adjustment mechanism, a spring adjustment actuator and an inertial actuator. The gravity compensating spring is coupled between two links of the four-bar linkage mechanism at two different spring attachment points to provide a lifting force opposing a gravitational load force. The spring adjustment mechanism is coupled to alter a position of one of the spring attachment points. The spring adjustment actuator is coupled to move the spring adjustment mechanism to alter the position of the spring attachment point and adjust the amount of lifting force provided by the spring. The inertial actuator is coupled between links of the four-bar linkage mechanism to effectuate rotational movement of the four-bar linkage mechanism and apply an adjustable amount of force to accelerate and manipulate a payload handled by the robotic manipulator.

Abstract: A radial stacked actuator includes an actuator ground; a motor including a motor ground constrained to the actuator ground with one or more rotational degrees of freedom; a spring coupled between the motor ground and the actuator ground; a gearbox coupled to the motor at an input of the gearbox; and an actuator output coupled to an output of the gearbox. The spring is configured to deflect as the motor ground rotates relative to the actuator ground.

Abstract: A robotic manipulator comprises a plurality of spring compensated joints, each including a four-bar linkage mechanism, a gravity compensating spring, a spring adjustment mechanism, a spring adjustment actuator and an inertial actuator. The gravity compensating spring is coupled between two links of the four-bar linkage mechanism at two different spring attachment points to provide a lifting force opposing a gravitational load force. The spring adjustment mechanism is coupled to alter a position of one of the spring attachment points. The spring adjustment actuator is coupled to move the spring adjustment mechanism to alter the position of the spring attachment point and adjust the amount of lifting force provided by the spring. The inertial actuator is coupled between links of the four-bar linkage mechanism to effectuate rotational movement of the four-bar linkage mechanism and apply an adjustable amount of force to accelerate and manipulate a payload handled by the robotic manipulator.

Abstract: A robotic arm system comprising a deployment system or a base, a first joint, and a manipulator coupled to the deployment system or base at the first joint and movable relative to the deployment link or base about the first joint. The manipulator includes a manipulator link, a second joint coupled to the manipulator link distal from the first joint, an elevation linkage coupled to the manipulator link at the second joint, a wrist coupled to the elevation linkage distal from the second joint, and an end effector coupled to the wrist. The end effector can change elevation via the elevation link without changing orientation.

Abstract: A robotic manipulator comprises a plurality of spring compensated joints, each including a four-bar linkage mechanism, a gravity compensating spring, a spring adjustment mechanism, a spring adjustment actuator and an inertial actuator. The gravity compensating spring is coupled between two links of the four-bar linkage mechanism at two different spring attachment points to provide a lifting force opposing a gravitational load force. The spring adjustment mechanism is coupled to alter a position of one of the spring attachment points. The spring adjustment actuator is coupled to move the spring adjustment mechanism to alter the position of the spring attachment point and adjust the amount of lifting force provided by the spring. The inertial actuator is coupled between links of the four-bar linkage mechanism to effectuate rotational movement of the four-bar linkage mechanism and apply an adjustable amount of force to accelerate and manipulate a payload handled by the robotic manipulator.