US 11,053,101 B2
Bridge span replacement system
Mark Carney, Barrie (CA); Rob Doucet, Barrie (CA); and Larry Elisses, Barrie (CA)
Assigned to WESTERN MECHANICAL ELECTRICAL MILLWRIGHT SERVICES LTD., Barrie (CA)
Filed by WESTERN MECHANICAL ELECTRICAL MILLWRIGHT SERVICES LTD., Barrie (CA)
Filed on Aug. 2, 2019, as Appl. No. 16/530,811.
Application 16/530,811 is a continuation of application No. 15/979,358, filed on May 14, 2018, abandoned.
Application 15/979,358 is a continuation of application No. 15/238,433, filed on Aug. 16, 2016, granted, now 9,969,601, issued on May 15, 2018.
Application 15/238,433 is a continuation of application No. 14/883,359, filed on Oct. 14, 2015, granted, now 9,416,505, issued on Aug. 16, 2016.
Application 14/883,359 is a continuation of application No. 14/169,445, filed on Jan. 31, 2014, granted, now 9,163,367, issued on Oct. 20, 2015.
Application 14/169,445 is a continuation of application No. 13/787,461, filed on Mar. 6, 2013, granted, now 8,671,490, issued on Mar. 18, 2014.
Prior Publication US 2019/0352145 A1, Nov. 21, 2019
Int. Cl. E01D 21/00 (2006.01); B66C 17/20 (2006.01); E01D 21/06 (2006.01); B66C 19/00 (2006.01); B66C 19/02 (2006.01); E01D 22/00 (2006.01); B66C 5/04 (2006.01); B66C 13/04 (2006.01)
CPC B66C 17/20 (2013.01) [B66C 5/04 (2013.01); B66C 13/04 (2013.01); B66C 19/002 (2013.01); B66C 19/005 (2013.01); B66C 19/02 (2013.01); E01D 21/06 (2013.01); E01D 22/00 (2013.01)] 34 Claims
OG exemplary drawing
 
1. A system for replacing a bridge span with a replacement bridge span, the bridge span supported across piers of a train bridge that support a section of track overlying the bridge span, the section of track connecting portions of a railroad track adjacent to the section of track, the system comprising:
a gantry assembly comprising a gantry and leg portions located at opposite ends and opposite sides of the gantry for supporting the gantry on load-bearing surfaces at locations located off both ends of the bridge span, the distance between the leg portions on opposite sides of the gantry accommodating horizontal conveyance of the bridge span through the leg portions when installed onto the load-bearing surfaces; and
a gantry conveyance system including separately locatable vehicles releasably connectable to the bridge span, wherein the separately locatable vehicles are operable to suspend the bridge span beneath the separately locatable vehicles and convey a forward end and a rearward end of the bridge span horizontally along the gantry towards and away from a ground conveyance system,
the ground conveyance system including at least one rail car located on a portion of the railroad track off the bridge span, the ground conveyance system having support surfaces for supporting the forward end and the rearward end of the bridge span;
a lift system operable for lifting and lowering the bridge span relative to the piers and the ground conveyance system,
wherein the gantry supports the separately locatable vehicles for horizontal movement over a distance predetermined to convey the forward end and the rearward end of the bridge span respectively into positions overlying the at least one rail car of the ground conveyance system such that the forward end and rearward end of the bridge span can be conveyed in stages between the gantry conveyance system and the ground conveyance system,
wherein the leg portions support the gantry at a height from which the lift system is operable to lift the bridge span from the piers into at least one horizontal transport plane, the at least one horizontal transport plane predetermined to accommodate conveyance of the bridge span through the leg portions at a height above the support surfaces of the ground conveyance system from which the lift system can lower the bridge span onto the ground conveyance system.