Abstract: A control valve for an antiroll suspension for a vehicle, the valve having a body, sliding valve element which is coupled to a pendulum arm through a linkage so that the valve element slides when the pendulum moves on cornering of the vehicle, the valve including a pressure inlet port between lands, a return port and outlet ports which are coupled to hydraulic rams in the vehicle suspension, whereby the valve element operates to control pressure at the outlet ports so as to actuate the rams to thereby reduce body roll on the vehicle. Restricted flow through ducts past pistons and end chambers to ducts and return port provides an increasing pressure differential to generate forces on the valve element which tend to oppose the displacement of the valve element whereby the valve element moves to an equilibrium position which is dependent on the forces transmitted to it from the pendulum arm. An antiroll suspension for a vehicle including the valve is also disclosed.

Abstract: A collapsible bar assembly which is particularly useful in couplings between a tractor and an agricultural implement, the collapsible bar assembly having first and second bars which are normally co-linear but which rotate relative to one another when a predetermined compressive force is applied thereto such as by the agricultural implement striking an obstruction. The bar assembly can be incorporated into the draw bar or into various parts of the equipment such as a plough or the like which has ground working tines.

Abstract: An antiroll suspension for a vehicle, the suspension having a bar which is mounted transversely of the vehicle, the bar being coupled to a fixed strut and an extensible strut. The suspension includes control elements to control the extension and retraction of the extensible strut in proportion to laterally directed centrifugal forces acting on the vehicle during cornering so as to counter the effects of vehicle body roll.