Patent ID: 6018907
Filing Date: 2000-02-01
Classification: A01M

Abstract:
In an apparatus for application of a chemical treatment to plants in a field, a framework movable over the plants in the field, an impeller having a hub and at least one blade member extending radially, outwardly from the hub, the impeller being carried by the framework for rotation about an axis of rotation, a shroud carried by the framework at least partially surrounding the impeller, the shroud having a baffle wall and having an exit opening which is adjacent the impeller and faces the plants, means for rotating the impeller about the axis of rotation, the axis of rotation extending in a direction relative to the exit opening such that the blade member is traveling in a direction toward the exit opening as the blade member passes the baffle wall whereby the movement of the blade member relative to the baffle wall creates a stream of air in pulsating form at the exit opening and means carried by the framework for dispensing the chemical treatment onto the plants.