Abstract: A material spreader which is suspended beneath an airborne helicopter and which includes a container for flowable materials such as seeds, fertilizers or chemicals. The container has a discharge opening formed in its lower end which has a vertically movable valve positioned therein. The valve is controlled by the pilot of the helicopter from within the cockpit of the helicopter so that the application rate of the material may be varied without the necessity of landing the helicopter.

Abstract: An earthworking implement comprising a frame on which are supported front wheels, rear wheels and a rearmost dolly wheel. An aerator member with blades is rotatably secured to the frame between the front and rear wheels. The dolly wheel is mounted on the frame for rotation about a vertical axis at a location rearwards of the rear wheels. The front wheels and the dolly wheel represent endmost wheels on the frame. One of the endmost wheels is vertically movable with respect to the frame between raised and lowered positions, such that in the raised position the front wheels and dolly wheel define a common tangential plane which is at a level above the blades of the aerator member and below the rear wheels thereby establishing an operative aerating position whereas in the lowered position the front wheels and dolly wheel define a common tangential plane which is at a level below the aerator member and the rear wheels thereby establishing a transport position.

Abstract: A method and apparatus for casting of metals into a continuous casting mold wherein metal is cast out of a ladle into a tundish having at least one non-regulatable bottom discharge and into at least one mold by means of a pouring tube. After the start of the casting operation the casting jet emanating from the bottom discharge is controlled and, if desired, corrected to the desired casting jet formation and thereafter the pouring tube is brought into the casting position through the casting jet.