Bridge crane for the emplacement of elongate prefabricated membe

Details Bridge crane for the emplacement of elongate prefabricated membe Bridge crane for the emplacement of elongate prefabricated membe

1980-01-28

1981-08-11

Sheridan, Robert G.

Traversing hoists

Having boom shiftable vertically along a linear path

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

14 1, 52749, B66C 1706

Patent

active

042829780

ABSTRACT:
Precast beams or slabs of an elongate structure such as a bridge, viaduct or overpass are emplaced on spaced-apart piers by a bridge crane which comprises a framework consisting of a pair of parallel trusses interconnected by end portals and long enough to extend across three piers. Each truss has a bottom stringer formed on its underside with tracks engaged above each pier by rollers mounted on a pair of rocker arms which are part of an undercarriage movable on transverse guide rails. Top stringers of the trusses support a trolley carrying hoists for raising and lowering the transported castings. Longitudinal movement of the framework relative to the piers is brought about by a motor-driven capstan, carried on the framework, which is engaged by cables wound about deflecting rollers at the ends of the framework and on an anchor frame to which the ends of the cables are fastened, the anchor frame being secured to one of the undercarriages and carrying pulleys coacting with confronting deflecting rollers to form a tackle with a fourfold mechanical advantage.

REFERENCES:
patent: 3490605 (1970-01-01), Koss
patent: 3902212 (1975-09-01), Muller

Affiliated with

Also associated with

Rating

Bridge crane for the emplacement of elongate prefabricated membe does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bridge crane for the emplacement of elongate prefabricated membe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bridge crane for the emplacement of elongate prefabricated membe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1022445