초록 ▼

An auxiliary lift adapter (10) comprises spaced, parallel top load beams (40), bottom load beams (30) positioned beneath the top load beams, and scissors mechanisms (50) for raising and lowering the top load beams (40). Each scissors mechanism (50) comprises an exterior arm (52) pivotally connected

An auxiliary lift adapter (10) comprises spaced, parallel top load beams (40), bottom load beams (30) positioned beneath the top load beams, and scissors mechanisms (50) for raising and lowering the top load beams (40). Each scissors mechanism (50) comprises an exterior arm (52) pivotally connected to its bottom load beam (30) and slidably connected to its top load beam (40), an interior arm (54) pivotally connected to its top load beam (40) and slidably connected to its bottom load beam (30), and a pin (56) pivotally interconnecting the midpoints of the arms. Hydraulic cylinders (76) are provided for actuating the scissors mechanisms (50) and include safety locking valves for preventing operation of the cylinders in the event of loss of hydraulic pressure.

대표청구항 ▼

An auxiliary lift adapter for use with a primary lifting device having a lifting means of a predetermined width, to transport a load vertically through an opening having a lateral dimension which is less than the width of the lifting means of said primary lifting device, comprising: a pair of parall

An auxiliary lift adapter for use with a primary lifting device having a lifting means of a predetermined width, to transport a load vertically through an opening having a lateral dimension which is less than the width of the lifting means of said primary lifting device, comprising: a pair of parallel, normally horizontally disposed bottom load beams, the outer lateral surfaces of said bottom load beams being separated by a distance less than the width of the lifting means of said primary lifting device; a plurality of cross frames interconnecting the bottom load beams; a pair of parallel, normally horizontally disposed top load beams, said top load beams being positioned directly above said bottom load beams and having outer lateral surfaces which are separated by a distance less than the width of the lifting means of said primary lifting device; a pair of scissors mechanisms for selectively raising and lowering the top load beams relative to the bottom load beams, each scissors mechanism comprising an exterior arm pivotally connected to its bottom load beam at one end and slidably connected to its top load beam at the other end, an interior arm pivotally connected to its top load beam at one end and slidably connected to its bottom load beam at the other end, and means pivotally interconnecting the arms substantially at the midpoints thereof; a plurality of pickup adapters secured to said bottom load beams and extending laterally outwardly therefrom for supporting the auxiliary lift adapter and the load carried thereby by engaging the lifting means of said primary lifting device, wherein said pickup adapters hold the auxiliary lift adapter at a level lower than the level of the lifting means of said primary lifting device when in a lowered position; a cross frame interconnecting the lower ends of the interior arms of the scissors mechanisms; and a pair of hydraulic cylinders each positioned adjacent one of the bottom load beams and beneath the cylindrical object when the auxiliary lift adapter is in its lowered position, each of the hydraulic cylinders being connected between one of the cross frames interconnecting the bottom load beams and the cross frame interconnecting the lower ends of the interior arms of the scissors mechanisms, said hydraulic cylinders for selective actuation to raise and lower the top load beams and the cylindrical object carried thereby relative to the bottom load beams.