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US 4,050,739 AGranted
Unloading apparatus of truck
OwnerTerumasa Toyookainventor
Life of this patent
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OwnerTerumasa Toyookainventor
Estimating the term…
Apparatus for facilitating the loading and unloading of a motor truck. The rear spring suspension of the truck is fixed to and adjacent the rear ends of a pair of right and left flexible cantilever beams attached at their forward ends to the respective sides of the chassis or frame. The rear driving axle of the truck is connected with the transmission through a splined shaft variable in effective length. In normal driving the rear spring suspension is over the axle for direct support thereby. But when loading or unloading, the front wheels may be braked or blocked so that power operation of the rear wheels propels the axle forwardly and guidedly along the beams whereby the beams flex and allow the rear end of the chassis to lower to any desired extent. In a dump type truck, forward propulsion of the axle as aforesaid also elevates the forward end of the hinged container to thus dump its contents.
In an unloading apparatus for an engine-driven truck having a chassis, a rear axle including laterally-spaced ground-engaging driving wheels, and an engine-driven shaft extending to and operatively connected with the rear axle and comprising two coaxial telescopically-connected forward and rearward sections, said unloading apparatus comprising, a pair of flexible, laterally-spaced, elongated beams, bracket means attaching each said beam at its forward end to a respective side of the chassis, forwardly of the rear axle, spring means connected between each said beam at its rearward end, respectively, and the chassis, and means connecting the axle at its respective ends, for sliding on and along said beams, from a first position wherein said axle directly supports the chassis, to a selected one of a plurality of second positions forwardly on and along said beams, by and in response to power operation of the rear wheels by the telescopic shaft, said beams flexing downwardly in response to movement of the axle to a selected one of said second positions, to thereby effect lowering of the rearward end of the chassis.
In a vehicle, a chassis, a drive shaft, a driving axle journaling ground-engaging wheels at its respective ends, a first resiliently flexible beam secured at its forward end to said chassis and extending rearwardly to and adjacent said axle, a first sliding connection between the axle and said first beam, to enable said axle to translate in the fore-and aft direction with respect to said chassis, spring support means attached to the rearward end of said first beam and to said chassis, for supporting the latter, said axle being translatable on and along said first beam, said drive shaft comprising forward and rearward aligned sections telescopically connected for conjoint rotation about common fore-and aft axis, and means carried by said axle and connected with the rearward end of the rearward section to rotate the ground-engaging wheels by and in response to rotation of said shaft.
Dependencies are inferred from the claim text.