Spraying apparatus employing a skirt structure

Claim 1

Spraying apparatus employing a skirt structure comprising: a sprayer boom frame, a bag skirt structure carried by the frame and when inflated extending downwards therefrom to have its smoothly contoured convex lowermost portion in close proximity to the ground, the bag skirt structure forming an enclosure which is open to the ground, means for injecting air under pressure into the bag skirt and into the skirt enclosure whereby the bag skirt is inflated and the boom and the skirt structure will be supported above the ground and can be moved over the ground, said air bag structure comprising at least one air bag, the inner wall or walls of which comprise respectively the corresponding inside parallel leading and trailing wall parts or leading and trailing walls of the enclosure, and into which air bag or bags the air is injected under pressure and from which air passes into the enclosure, the said air passing from the said bag skirt structure into the enclosure via aperture means in the air bag or bags inner wall parts or walls respectively, each such aperture means extending the full length of the respective air bag inner wall part or wall, wherein an aperture means in the leading inner wall part or leading inner wall is disposed close to the ground, while an aperture means in the training inner wall part or trailing inner wall is disposed closely adjacent to a roof of the enclosure, and dispensing means mounted by the boom frame to deliver spray material to the skirt enclosure.