Adjustable single-beam gantry

Details Adjustable single-beam gantry Adjustable single-beam gantry

1975-08-14

1977-08-16

Spar, Robert J.

Railways

Portable elevated

212 13, E01B 2300

Patent

active

040418758

ABSTRACT:
A load-handling gantry having a single, unitary, bridging beam, and leg, brace and mounting components supporting the beam with provision for adjustment of gantry span, height, and spread, while maintaining gantry mobility. The mounting components are adjustable to enable use of the gantry in a number of configurations including inboard, outboard, and combination leg bracing, and with freedom for use under cantilever conditions. In the preferred embodiment, a predetermined camber, or longitudinal splay angle, of the plane of each pair of legs is provided, to decrease movement between the gantry legs and the beam, in the direction lengthwise of the beam, when the gantry is under load, thereby stabilizing the gantry in that sense. The selected splay angle is maintained by apparatus which couples the leg bracing struts to the beam and to the legs. Any selected angle, under the various arrangements of leg bracing, may be had, and may be maintained, by such coupling apparatus, which provides alteration of the effective bracing strut length, without the necessity of actually substituting struts of different lengths. Lateral clearance between the beam, and the legs and bracing struts, is maintained in the various configurations, at a value such as to permit free movement of the leg and strut assemblies along the length of the beam, and also a measure of lateral flexibility of the gantry. All adjustments relative to the beam may be made through external frictional gripping apparatus, cooperable with a standard imperforate beam.

REFERENCES:
patent: 1725168 (1929-08-01), Willis
patent: 2436337 (1948-02-01), Smith et al.
patent: 2990788 (1961-07-01), Wallace
patent: 2995094 (1961-08-01), Wallace
patent: 3490385 (1970-01-01), Gibbins et al.
patent: 3826196 (1974-07-01), Wallace

Affiliated with

Also associated with

Rating

Adjustable single-beam gantry does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adjustable single-beam gantry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable single-beam gantry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-354363