| 摘要 |
PCT No. PCT/GB98/00013 Sec. 371 Date Jun. 17, 1999 Sec. 102(e) Date Jun. 17, 1999 PCT Filed Jan. 5, 1998 PCT Pub. No. WO98/30087 PCT Pub. Date Jul. 16, 1998Agricultural crop spraying apparatus comprising a spray boom made from a space-frame of members comprising laterally and vertically spaced longitudinally extending members joined at intervals by traverse cross-members, with the spray nozzles disposed within the boom framework for protection characterized in that the cross-members of the spray boom frame are positioned above the lowest extremity of the boom framework to allow the spray nozzles to be disposed below the cross-members while still positioning the nozzles within the boom and to allow uninterrupted longitudinal positioning of the spray nozzles. Preferably, the cross-section of the boom is substantially triangular so that the sections of the folded boom arms interfit one with the other. Hinges joining the section of the boom preferably have inclined pivot axes such that the height reached by the boom extremities during folding is less than the arms pivot vertically. |
