Hydraulic boom for gantry and the like

Details Hydraulic boom for gantry and the like Hydraulic boom for gantry and the like

1992-11-04

1999-02-02

Young, Karen M.

Traversing hoists

Overhead

Surface vehicle

212292, 212314, 212343, 104126, B66B 1100

Patent

active

058653279

ABSTRACT:
A hydraulic boom gantry and a method of lifting a load associated therewith. The gantry includes telescoping sections with a hydraulic cylinder mounted therein. A swiveling plate structure allows minor deviation between sets of telescoping sections. A collar structure and a pinning structure lock the telescoping sections together. A cam mechanism prevents accidental section retraction and a powered rigging device traverses a beam connecting the telescoping sections.

REFERENCES:
patent: 3090494 (1963-05-01), Thiele
patent: 3335875 (1967-08-01), Fachinetti
patent: 3398492 (1968-08-01), Nansel
patent: 3462023 (1969-08-01), Grove
patent: 3795321 (1974-03-01), Johnston
patent: 3841494 (1974-10-01), Chalupsky et al.
patent: 4036372 (1977-07-01), Rao et al.
patent: 4260064 (1981-04-01), Ekstam
patent: 4350255 (1982-09-01), Blase et al.
patent: 4381839 (1983-05-01), Engler et al.
patent: 4573853 (1986-03-01), Lorenz

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