Patent ID: 7740189

Claim:
A suspension arrangement for supporting a boom lift assembly and a boom supported thereon on a chassis of an agricultural sprayer traveling in a forward direction of travel, the boom lift assembly configured to move the boom between a raised, inoperative position and a lowered, operative position, comprising: said boom lift assembly include a lift linkage; said lift linkage includes a lower left linkage member generally parallel to an upper right linkage member; said lower left linkage member and said upper right linkage member have opposing first and second ends; said first end of both upper right linkage member and lower left linkage member are pivotally attached at a carrying frame about a horizontal-aligned axis; said second end of both said upper right linkage member and lower left linage member are attached at a pivot linkage; said pivot linkage pivotally coupling the boom lift assembly and the chassis; a lift actuator mechanism is configured to be mounted on lower left linkage mechanism and connected to carrying frame; wherein said pivot linkage includes a first pivot plate member generally parallel alignment with a second pivot plate member, both first and second pivot plate member in general vertical alignment; said boom lift assembly is pivotally connected between said first and said second pivot plate members; said first and second pivot plate members include a forward end and an opposite rearward free end; said forward end of each first and second pivot plate members are pivotally connected to said chassis; said rearward free end of each first and second pivot plate members is free to pivot away from said chassis; said rearward free end of first and second pivot plate members is pivotally connected at said boom lift assembly; and a dampener located between the pivot linkage and the chassis, the dampener configured to reduce transfer of an impact force between the chassis and the boom lift assembly; wherein said dampener dampens vertically on said pivot linkage relative said chassis; said chassis reduces transfer of said impact force into said pivot linkage, boom lift assembly and boom; wherein said suspension arrangement placed directly on said chassis to allow said boom link assembly to float independent of the said chassis.