Abstract: A suspension system for a vehicle has an upper control arm and an associated lower control arm for mounting a wheel on the vehicle body. A hydro-pneumatic spring is connected between one of the control arms and the vehicle body. A compensating spring is associated with the hydro-pneumatic spring and is operable to act in opposition to the force exerted by the hydro-pneumatic spring as the hydro-pneumatic spring approaches full extension.

Abstract: An article dump truck has a front tractor unit connected to an associated rear trailer unit with a tipping container by an articulated coupling. The articulated coupling is operable to allow the front tractor unit and rear trailer unit to pivot about a vertical pivot axis, rams being provided to turn the front tractor unit and rear trailer unit about the pivot to steer the dump truck. The articulated coupling also allows the front tractor unit and rear trailer unit to rotate relative to each other about a longitudinal axis of the dump truck. In addition, the front tractor unit has a front chassis mounted on a pair of wheels by an independent suspension system.

Abstract: An article dump truck has a front tractor unit connected to an associated rear trailer unit with a tipping container by an articulated coupling. The articulated coupling is operable to allow the front tractor unit and rear trailer unit to pivot about a vertical pivot axis, rams being provided to turn the front tractor unit and rear trailer unit about the pivot to steer the dump truck. The articulated coupling also allows the front tracter unit and rear trailer unit to rotate relative to each other about a longitudinal axis of the dump truck. In addition, the front tractor unit has a front chassis mounted on a pair of wheels by an independent suspension system.

Abstract: A vehicle suspension spring system for a vehicle wheel station includes a hydraulic cylinder or strut having a piston which divides the cylinder volume into a main oil volume and an annular oil volume. The main oil volume communicates via a first oil passage with a first accumulator having a main gas volume. The annular oil volume communicates via a second oil passage with a second accumulator having an auxiliary gas volume. The oil in each accumulator is separated from the gas by a separator piston or diaphragm. A third oil passage with an isolating valve interconnects said first and second oil passages. Operation of the isolating valve is regulated by a controller. At least one sensor for sensing a parameter associated with vehicle attitude is connected to the controller. The controller is operable for switching the isolating valve between open and closed positions for altering spring stiffness of the strut in response to said sensed vehicle attitude parameter when the vehicle is in motion.

Abstract: A suspension system for a vehicle has an upper control arm and an associated lower control arm for mounting a wheel on the vehicle body. A hydro-pneumatic spring is connected between one of the control arms and the vehicle body. A compensating spring is associated with the hydro-pneumatic spring and is operable to act in opposition to the force exerted by the hydro-pneumatic spring as the hydro-pneumatic spring approaches full extension.

Abstract: An article dump truck has a front tractor unit connected to an associated rear trailer unit with a tipping container by an articulated coupling. The articulated coupling is operable to allow the front tractor unit and rear trailer unit to pivot about a vertical pivot axis, rams being provided to turn the front tractor unit and rear trailer unit about the pivot to steer the dump truck. The articulated coupling also allows the front tracter unit and rear trailer unit to rotate relative to each other about a longitudinal axis of the dump truck. In addition, the front tractor unit has a front chassis mounted on a pair of wheels by an independent suspension system.

Abstract: An article dump truck has a front tractor unit connected to an associated rear trailer unit with a tipping container by an articulated coupling. The articulated coupling is operable to allow the front tractor unit and rear trailer unit to pivot about a vertical pivot axis, rams being provided to turn the front tractor unit and rear trailer unit about the pivot to steer the dump truck. The articulated coupling also allows the front tracter unit and rear trailer unit to rotate relative to each other about a longitudinal axis of the dump truck. In addition, the front tractor unit has a front chassis mounted on a pair of wheels by an independent suspension system.

Abstract: A suspension system for a vehicle has an upper control arm and an associated lower control arm for mounting a wheel on the vehicle body. A hydro-pneumatic spring is connected between one of the control arms and the vehicle body. A compensating spring is associated with the hydro-pneumatic spring and is operable to act in opposition to the force exerted by the hydro-pneumatic spring as the hydro-pneumatic spring approaches full extension.

Abstract: A vehicle suspension spring system for a vehicle wheel station includes a hydraulic cylinder or strut having a piston which divides the cylinder volume into a main oil volume and an annular oil volume. The main oil volume communicates via a first oil passage with a first accumulator having a main gas volume. The annular oil volume communicates via a second oil passage with a second accumulator having an auxiliary gas volume. The oil in each accumulator is separated from the gas by a separator piston or diaphragm. A third oil passage with an isolating valve interconnects said first and second oil passages. Operation of the isolating valve is regulated by a controller. At least one sensor for sensing a parameter associated with vehicle attitude is connected to the controller. The controller is operable for switching the isolating valve between open and closed positions for altering spring stiffness of the strut in response to said sensed vehicle attitude parameter when the vehicle is in motion.

Abstract: A suspension assembly has a pair of suspension arms, namely a forward suspension arm and a rear suspension arm. Each suspension arm is pivotally mounted on a housing containing spring means associated with each of the suspension arms. A wheel hub assembly is mounted at an outer end of each suspension arm. An inner end of each suspension arm is connected by a pivot shaft with a lower end of an associated lever arm mounted within the housing. An upper end of the lever arm is connected to the spring means. The spring means opposes pivotal movement of the suspension arm away from a neutral position. Mounting flanges on the housing allow the assembly to be bolted to a floor of a vehicle and adjusted for correct alignment on the vehicle.

Abstract: A suspension system for a vehicle has an upper control arm and an associated lower control arm for mounting a wheel on the vehicle body. A hydro-pneumatic spring is connected between one of the control arms and the vehicle body. A compensating spring is associated with the hydro-pneumatic spring and is operable to act in opposition to the force exerted by the hydro-pneumatic spring as the hydro-pneumatic spring approaches full extension.

Abstract: A lightweight wheel is constructed of titanium or a composite material such as carbon fibre reinforced nylon material. The wheel has a central hub and a circular rim which are interconnected by sprig elements such as may be formed by a looped spring band having a number of radial loops extending between the hub and rim. A tyre strip may be mounted around an outer circumferential face of the rim.

Abstract: A suspension assembly has a pair of suspension arms, namely a forward suspension arm and a rear suspension arm. Each suspension arm is pivotally mounted on a housing containing spring means associated with each of the suspension arms. A wheel hub assembly is mounted at an outer end of each suspension arm. An inner end of each suspension arm is connected by a pivot shaft with a lower end of an associated lever arm mounted within the housing. An upper end of the lever arm is connected to the spring means. The spring means opposes pivotal movement of the suspension arm away from a neutral position. Mounting flanges on the housing allow the assembly to be bolted to a floor of a vehicle and adjusted for correct alignment on the vehicle.

Abstract: A suspension unit for a leading or trailing suspension arm which carries a vehicle road wheel has a pair of hydrogas units connected to the suspension arm and arranged to resist movement of the suspension arm in opposite directions. The suspension unit of the invention can be used in vehicles which are required to be invertible.

Abstract: A suspension system for a vehicle has an upper control arm and an associated lower control arm for mounting a wheel on the vehicle body. A hydro-pneumatic spring is connected between one of the control arms arid the vehicle body. A compensating spring is associated with the hydro-pneumatic spring and is operable to act in opposition to the force exerted by the hydro-pneumatic spring as the hydro-pneumatic spring approaches full extension.

Abstract: A vehicle suspension system (1) which provides roll control comprises a pair of hydraulic actuators (2, 3) mounted at wheels on opposite sides of the vehicle chassis, each hydraulic actuator (2, 3) being connected between the wheel and the chassis. Each hydraulic actuator (2, 3) has a fluid filled variable volume fluid chamber (8, 9) defined by a cylinder (4, 5) and piston (6, 7), one part being connected to the wheel and the other part to the chassis. An hydraulic accumulator (12, 13) is connected to each fluid chamber via a fluid transfer line (14, 15) to act as a spring with damping means being provided by a flow restrictor orifice (10, 11). A pump (16) communicates via fluid transfer lines (14, 15) between both hydraulic actuator fluid chambers (8, 9) through a control valve (19) which is operable to isolate both chambers (8, 9) from each other and from the pump (16) or to selectively connect one chamber (8, 9) to an inlet (17) of the pump (16) and the other chamber (8, 9) to an outlet of the pump (16).