Parallelogram boom devices for mounting agricultural implements to short wheel base tractors and adjusting implement position relative to ground

A parallelogram boom device for mounting agricultural implements to short wheel base tractors having right and left front wheels mounted via an axle unit to a chassis that carries a motor assembly between said wheels and adjusting the position of such mounted implements relative to ground during their operation, said boom device comprising:

• a parallelogram arrangement of a first upper beam horizontally aligned with a second upper beam along a longitudinal axis plus a single lower beam longitudinally aligned with said first and second upper beams, but at a horizontal level therebelow, said arrangement being defined by a forward end and a rearward end,
• said first upper beam defined by a first front end, a first rear end and a first arcuate midsection integrally joining said first front end to said first rear end,
• said second upper beam defined by a second front end, a second rear end and a second arcuate midsection integrally joining said second front end to said second rear end,
• said single lower beam defined by a third front end, a third rear end and a third arcuate midsection integrally joining said third front end to said third rear end,
• a U-shaped mount, positioned adjacent said forward end of said parallelogram arrangement, comprising a vertical plate defined by a top end and a bottom end plus right and left support legs that extend normally from said bottom end to support said mount upon said chassis inboard of said wheels and in front of said motor assembly,
• a horizontal top spar supported by said top end and a horizontal bottom spar supported by said bottom end,
• said first and second front ends of said upper beams being rotationally carried by said top spar,
• said third front end of said lower beam being rotationally carried by said bottom spar,
• a bridle having one end fixed to said first arcuate midsection and an opposed end fixed to said second arcuate midsection holding said first and second beams horizontally spaced apart and longitudinally aligned,
• first hydraulic piston means attached to said bridle to raise and lower said parallelogram arrangement relative to said ground,
• a frame, defined by an upper frame portion, a lower frame portion and a central frame portion, positioned vertically adjacent said rearward end of said parallelogram arrangement, said first and second rear ends being attached to said upper frame portion and said third rear end being attached to said central frame portion,
• a lug that extends laterally from said lower frame portion carrying a bearing outboard of said lower portion,
• an implement mounting arm defined by an inboard end and an outboard end, said inboard end being rotationally pinned to said bearing and said outboard end being equipped to support an agricultural implement, and
• second hydraulic piston means attached to said implement mounting arm to raise and lower it.

The combination of a short wheel base tractor having right and left front wheels mounted via an axle unit to a chassis that carries a motor assembly between said wheels and at least one parallelogram boom device for mounting an agricultural implement to said tractor and adjusting the position of such mounted implement relative to ground during its operation, said parallelogram boom device comprising:

• a parallelogram arrangement of a first upper beam horizontally and longitudinally aligned with a second upper beam plus a single lower beam longitudinally aligned with said first and second upper beams, but at a horizontal level therebelow, said parallelogram arrangement being defined by a forward end and a rearward end,
• a U-shaped mount carried upon said chassis inboard of said wheels comprising a vertical plate,
• a horizontal top spar and a horizontal bottom spar supported by said mount in a plane parallel to said plate,
• said forward end of said parallelogram arrangement being supported by said top and bottom spars,
• hydraulic piston means attached to said parallelogram arrangement to raise and lower it,
• a frame positioned vertically adjacent said rearward end of said parallelogram arrangement, said frame being supported by said rearward end of said parallelogram arrangement,
• a lug that extends laterally from said frame carrying a outboard bearing,
• an implement mounting arm defined by an inboard end and an outboard end, said inboard end being rotationally pinned to said bearing and said outboard end being equipped to support an agricultural implement, and
• hydraulic piston means attached to said implement mounting arm to raise and lower it.