Gantry having adjustable side supports

Details Gantry having adjustable side supports Gantry having adjustable side supports

1981-03-02

1983-05-03

Love, John J.

Traversing hoists

Having boom shiftable vertically along a linear path

Length of hoisting cable between boom and load decreases...

238 21, B66C 1100

Patent

active

043818390

ABSTRACT:
A large gantry for straddling and handling a heavy load comprises a pair of vertical support assemblies which support a horizontal load-bearing gantry beam. Each support assembly comprises three vertically disposed independently extendable/retractable hydraulic rams. A tiltable self-leveling sole plate is located between the upper ends of the three rams in each support assembly and the underside of an end of the gantry beam. A control system which includes selectively operable panel-mounted joy-stick actuated control switches and control valves effects operation of the rams in unison to raise and lower the gantry beam and also effects independent individual operation of any ram to level the beam if necessary. The arrangement increases the stability, the load-handling capacity and the operational safety of the gantry.

REFERENCES:
patent: 2599599 (1952-06-01), Akens
patent: 2995094 (1961-08-01), Wallace
patent: 3302801 (1967-02-01), Povoli
patent: 3335875 (1967-08-01), Fachinetti
patent: 4262519 (1981-04-01), Mason

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