A device and a method for influencing a dynamic property of at least one movably mounted body of two bodies coupled mechanically at least via a variably adjustable stiffness along a first force path. The invention includes a damping element with constant damping properties directly or indirectly coupled in series with the variably adjustable stiffness along the first force path Both bodies are mechanically directly or indirectly coupled via a second force path running parallel to the first force path along which at least one adjustable stiffness is incorporated. The damping property of the damping element and the adjustable stiffnesses are coordinated and configured so that a damping property assigned to the device for mechanical coupling can be varied exclusively by the adjustable stiffnesses.

A lift device includes a base, an arm, a drive actuator, a tractive element, and a steering actuator. The arm has a base end coupled to the base and a tractive element end. The arm includes a steering actuator interface positioned along an exterior surface of the arm. The drive actuator is pivotally coupled to the tractive element end of the arm. The tractive element is coupled to the drive actuator. The steering actuator has a first end coupled to the steering actuator interface and an opposing second end coupled to the drive actuator. The arm includes a plate extending forward of the exterior surface of the arm and past the steering actuator.

A lift device includes a base having a first end and an opposing second end, a first arm pivotally coupled to the first end, a second arm pivotally coupled to the first end, a third arm pivotally coupled to the opposing second end, a fourth arm pivotally coupled to the opposing second end, and a leveling assembly. The leveling assembly includes a first actuator extending between the first arm and the first end, a second actuator extending between the second arm and the first end, a third actuator extending between the third arm and the opposing second end, a fourth actuator extending between the fourth arm and the opposing second end, and a controller configured to control the first actuator, the second actuator, the third actuator, and the fourth actuator to reconfigure the leveling assembly between (i) a shipping, transport, or storage mode and (ii) an operational mode.

A lift device includes a chassis, a first actuator coupled to the chassis, a second actuator coupled to the chassis, a third actuator coupled to the chassis, a fourth actuator coupled to the chassis, and a fluid circuit. The fluid circuit is configured to facilitate selectively fluidly coupling the first actuator, the second actuator, the third actuator, and the fourth actuator in at least four different configurations where, in each of the at least four different configurations, two of the first actuator, the second actuator, the third actuator, and the fourth actuator are fluidly coupled together while the other two of the first actuator, the second actuator, the third actuator, and the fourth actuator are fluidly decoupled.

Disclosed embodiments are related to suspension systems including dampers and suspension actuators and related methods of control for mitigating the effects of potholes and other road surface discontinuities.

A suspension device includes: a hydraulic damper including a rod provided with a valve for generating a hydraulic pressure when the rod is displaced between a first liquid chamber and a second liquid chamber; and an electric damper configured to electrically displace the rod by an actuator. The electric damper includes: an outer cylinder; an inner cylinder; a piston provided on the rod and configured to stroke in the inner cylinder; and a communication passage disposed inside the inner cylinder at a central portion where the piston strokes. The communication passage establishes communication between the first liquid chamber at one axial end side of the piston and the second liquid chamber at another axial end side of the piston.

The invention proposes a method of supplying with hydraulic fluid a hydraulic motor (2) of a drive wheel supporting a vehicle by means of a cylinder-type suspension system (1). The hydraulic fluid passes through a feed duct (25) extending longitudinally through a cylinder (3) of the cylinder-type suspension system (1). The invention also relates to the use thereof in order to eliminate the need for hoses.

A ground vehicle may include a platform and a swing arm that may be rotatably coupled to the platform. The swing arm may be configured to move from a first position to a second position by rotating the swing arm about a pivot point on the side of the platform. The pivot point may correspond to where a proximal end of the swing arm couples to the side of the platform. The swing arm may also be configured to move from either the first position or the second position to a third position by actuating the swing arm from the pivot point such that a distal end of the swing arm moves away from the platform to broaden a wheelbase of the ground vehicle. The ground vehicle may also include a centerless wheel assembly coupled to the swing arm.

A motor vehicle, in particular a motorcycle or a motorcycle-like vehicle, includes a wheel suspension supporting the vehicle frame with a spring assembly. The wheel suspension is designed to compress in a compression direction and to rebound in an opposite rebound direction. The wheel suspension includes a lowering device which can be selectively actuated by a pressure fluid in an active state to apply a preload to the wheel suspension to alter a ride height of the motor vehicle.

An active suspension device includes: a preview sensor that detects a height of a road surface in front of a wheel; and an ECU that controls a stroke of a suspension to perform a preview control. The ECU includes: a front wheel preview control part that performs a preview control; a preview control success determination part that determines whether the preview control is successful; and a rear wheel control part that controls a stroke of a suspension of a rear wheel. When the preview control of the front wheel is successful, the rear wheel control part performs a preview control and a skyhook control of a rear wheel to control the stroke of the suspension of the rear wheel. When the preview control of the front wheel is unsuccessful, the rear wheel control part cancels the preview control of the rear wheel and perform the skyhook control of the rear wheel.