Abstract: A device is attached to a vehicle, such as a tractor, to deliver slurry into soil. The device has a hinged connector allows side-to-side movement between the vehicle and the main frame. There is at least one coulter attached to the main frame, a retaining wheel and slurry applicator attached to the main frame; and a closure wheel attached to the main frame. The at least one coulter preferably is a double coulter system.

Abstract: An acrylic fiber bundle is rapidly thermally stabilized in an oxidative atmosphere by exposure to a selected temperature profile as the fiber passes through varying density ranges during stabilization.

Abstract: A snow toboggan, or a flat bottomed sled, has a body with a curved forward portion. At its aft end, the sled is outfitted with a pair of hinged drag panels, each hinged independently to the body of the sled. On the underside of each panel is disposed one or more spikes which are capable of digging into the snow. Also on the underside of the body near its aft end is fixed a longitudinally oriented fin which is used to stabilize the forward motion of the sled. On the underside of the curved portion of the body is pivotably supported a pair of front stabilizing fins which are used to stabilize the sled when the sled is travelling across a hill or traversing a hill, to prevent the forward end from sliding down the hill. When not needed, these front stabilizing fins are rotated up out of the snow so that sharp turns can be maneuvered. Sharp turns are obtained by lowering one panel at a time by suitable means mounted in the body to allow the spikes thereunder to grip into the snow.

Abstract: An inflatable spherical device is disclosed made of two hemispherical shells or sections that are fastened together by a quick disengageable means, such as a zipper. Each hemispherical shell is made of an outer flexible skin and an inner flexible skin, concentrically spaced apart and having an annular circular flat member bonded by its outer periphery to the periphery of the outer skin and by its inner periphery to the periphery of the inner skin, forming a hemispherical air-tight compartment. Means are provided to inflate each shell. To maintain the outer and inner skins evenly spaced apart and to provide ventilation through the shells, a plurality of flexible wall tubes are disposed between the outer and inner skins. The respective ends of the tubes are bonded to suitable apertures in each of the outer and inner skins.