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US 6,354,782 B1Granted
Container crane hoist and system
OwnerLeonard D. Barryinventor
Life of this patent
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OwnerLeonard D. Barryinventor
Estimating the term…
A device has lift arms (42) with links (46,46D) connected to ends of a loadspreader (40) or the links (46,46D) are swivelly connected to the lift arms (42) and aligned to hook special containers (20D). The lift arms (42) are pivotally connected to a hub (44,44B) to swing vertically. Each hub is mounted to rotate on a vertical support shaft (38) central between the ends of the loadspreader (40) or hooking and lifting links (46,46D) for each end of a load. A hydraulic cylinder (48) or ropes (168) connects each lift arm to its hub to lift and lower the arms (42) together to lift and lower the loadspreader (40) substantially level or oppositely to end dump special containers. The hubs (44,44B) can be rotated relatively horizontally to move the loadspreader (40) sidewise parallel and/or turn it to align a load. A rotary crane (18) carries the lift linkage about a support pivot with parallel positioning control to translate the loadspreader over a circular area and with control to extend or retract the loadspreader sideways.
A crane hoist comprising in combination, a crane for supporting, lifting and moving a load, a vertical support shaft depending from said crane to carry the load, a plurality of lift arms pivotally mounted on said shaft extending out therefrom to swing up and down in substantially opposite directions each having an outer lifting end, a lifting link pivotally depending from the outer said end of each said arm to swing vertically to compensate for the arc of movement of said arms horizontally varying the distance between the outer ends of said arms, load lift means for raising and lowering the outer ends of said arms, a load support and means for pivotally engaging said load support on the bottom of said links to lift and lower the load and distribute the load between said links.
A hoist comprising in combination, at least two lifting arms each having a support end and a lifting end, means for pivotally supporting the support end of each of said arms so the other ends of said arms can swing up and down, means for raising and lowering the lifting end of each of said arms to lift and lower a load, a link pivotally suspended depending from the lift end of each said arm to swing generally parallel the plane of the arm, a load bearing device having ends pivotally secured to the bottom of said links to swing vertically to be lifted and lowered by said arms together, said links being long enough to compensate for the lifting swing of said arms, whereby said means for pivotally supporting can remain at one height while the load bearing device is lifted and lowered.
Dependencies are inferred from the claim text.