Abstract: There is disclosed a toggle linkage for moving a closure panel between a ventilating position and a closed position. The closure panel is detachably arranged in an opening formed in a vehicle roof. The toggle linkage comprises a handle pivotably connected to the lower surface of the closure panel and having bearing lugs, a bearing component fixed on the lower surface of the vehicle roof and having a base, and a link mechanism for connecting the handle with the bearing component. In this arrangement, means are provided to limit rotation of the handle to a predetermined position whereby the closure panel is maintained in its ventilating position.

Abstract: A power steering system for vehicles includes a four-way valve slidable in response to applied steering torque for selectively connecting a pair of hydraulic oil chambers of a servo cylinder to a hydraulic pressure source and an oil reservoir. A pair of hydraulic rection chambers are disposed one on each side of the four-way valve and each contain a pair of plungers and a spring interposed therebetween. The plungers are held by and between a pair of diametrical pins supported on the valve and spaced axially from each other. When the reaction chambers are pressurized by an increased speed of the vehicle or a change in resistance from the road surface, the plungers are urged against the pins on the valve to prevent the latter from being slid axially, thereby allowing the driver of the vehicle to feel a suitable resistance to turning of the steering wheel without being assisted by auxiliary power from the servo cylinder.