Gantry

Details Gantry Gantry

1975-01-16

1976-07-20

Wood, Jr., M. H.

52749, 61 45D, B25J 300

Patent

active

039702006

ABSTRACT:
A gantry for use in positioning heavy arcuate ceiling blocks in a tunnel with upstanding legs supporting the ends of a horizontal platform or deck which carries on its upper surface a plurality of trolleys adapted to be power driven along the length of the platform. Each trolley carries two pairs of upstanding hydraulic jacks, the upper ends of which are adapted to support and elevate an arcuate ceiling block from below. The position of one pair of jacks on each trolley can be adjusted horizontally with respect to its respective trolley. The entire gantry is wheel-mounted at its lower end for movement along the tunnel floor in a direction transverse to the direction of movement of the trolleys.

REFERENCES:
patent: 3298154 (1967-01-01), Behr
patent: 3409158 (1968-11-01), Lull
patent: 3468510 (1969-09-01), Wehner
patent: 3552583 (1971-01-01), Toffolon
patent: 3679177 (1972-07-01), Scholz
patent: 3796334 (1974-03-01), Torrey
patent: 3863420 (1975-02-01), Peiffer

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