Abstract: A control valve for controlling the fluid flow of particulate and other materials through a conduit having a housing accepting the fluid flow received from an inlet conduit. A selectively positionable elliptical shaped diverter plate is positioned in a central chamber formed between two outlet conduits for diverting the fluid flow into one or both two outlet conduits as needed. The diverter plate is dimensioned substantially the same as the configuration as the input ends of both of said outlet conduits and the center chamber. The walls of the input ends of the outlet conduits taper inwardly in the direction of the outlet end decreasing in size allowing the diverter plate to seat against in walls and seal or divert fluid flow from one or the other outlet conduits without the need for a stop or seal.

Abstract: A motorized vehicle, particularly a wheelchair, having a joystick controller for controlling energization of driving motors which in turn drive vehicle wheels and control steering of the vehicle. The joystick controller includes fiber-optic arrangements which sense tilting movement of the joystick in forward, rearward, rightward or leftward directions, or a combination thereof. Light signals are generated of an intensity corresponding to the position of the joystick, which signals are converted into electric signals and supplied to a controller which in turn controls energization of the drive motors to control driving and steering of the vehicle.